Convert it to the cool new hundreds, fill a small briefcase and handcuff case to your wrist. Behave casually.
Frozen turkey cavity.
(Remember to take it out before Thanksgiving.)
I got several much-needed LOLZ so far, and I thank you all for that. Keep 'em coming, these are great! 
Don’t emulate my rich, miserly uncle. He bought some quantity of gold as an investment, then buried it in tubes specially designed to thwart metal detectors. Of course he forgot where they were buried. My grandpa was choking from laughter as he described my uncle getting kicked off the property he’d now sold, trying desperately to recover his gold. It never happened, and he’s deceased now.
And do NOT trade in a car without first recovering the emergency cash stashed in the owner’s manual. 
LOVE the litterbox idea! 
And the sardines!
Again w/ the ziplock bags…
-Stuff them in 1/2 full bottles of shampoo or other non-spray product. Bonus if they are “feminine” products, or at least super girly stuff.
-If you just want it out of sight while movers are in and out, tape it to the underside of the toilet tank lid
- At the bottom of a barrel of birdseed (if you feed wild birds)
-Wrap a sturdy piece of string or wire around it, tuck it into the car’s wiper fluid tank or the gas tank fill tube and secure the wire or string WELL so you can pull it out later.
-Inside your bras in the padding. Especially easy if you have sports bras with removable pads, they already have slits in them!
-In w/ the Monopoly game’s money (might require some creative folding)
-In your unpaid bills. Leave the bills in their envelopes and if you’re really good, make it look like they haven’t been opened yet.
Bundle it and toss it up in the air. Works for only a very short time.
Just in case one is interested in making a practical suggestion:
a) How much money are we talking about here?
b) Any problem with most of the money being in $100 bills? (If not, then go to the bank and trade most of your lower-denomination stuff for $100s, since you can carry several thousand dollars’ worth on your person.)
c) How are you getting your own self to your new location - driving, flying, bus, train?
send it to me, I’ll hide it for you.
You could also do the Smuggler Classic – sealing it in a tube and hiding it in your rectum.
You got that from A Child’s Garden of Grass, right?
When I was a young tween, making a fair amount of cash from babysitting that I did not wish to tempt my brother with, I would hide my cash inside a beloved stuffed animal, my battered old teddy bear.
I used an exacto knife to make a 1/2" opening in the teddy bear’s armpit seam, removed a bit of stuffing, and filled it in with cash. Replace Teddy amongst the stuffed animal collection, and voila!
Later, when old Teddy was more cash than stuffing and I had an actual bank account, I did a nice overhaul on him and bought him new stuffing and resewed all his seams. Nobody was ever the wiser. Doubtful that anyone would suspect I’d actually CUT HOLES in my old teddy bear, or ever pick him up for an extensive hug session.
That’s so crazy, it might actually work. Seriously, why can’t the OP just deposit the money in a bank account?
How 'bout because her life isn’t much fun right now, and she wants to get her giggles however and whenever she can?
Because she’s going to be raking in cash on a weekend and going to the bank at the end of a long trying day isn’t feasible?
Because she’s going to need that cash pretty much immediately after the yardsale and there’s no point in depositing it on Sun pm to take it back out again Mon am?
Because (as she said in her OP) she wants “as making me laugh posts”.
Humor the lady, willya?
In a baggie stuffed in a bag of catfood
In milk or oj. I would suggest NOT using a clear plastic milk or juice container.
In the bag or canister area of your full vacuum.
In the soil of a potted plant (not a pot plant)
Husband suggests:
Inside a box of bbs or pellet shot if you have a bb gun or air rifle
Buried inside a box of LEGO.
Inside a board-game or box of puzzle pieces.
If you use pads instead of tampons, you can fold the bills inside of clean pads and return them to their packaging as well.
Taped to the bottom or top of a rug, rolled up and tied for transport.
Inside mattresses or couch cushions.
Taped to the inside of paper DVD or BluRay or game disk inserts. (best with games that come in opaque containers).
The output bin of a paper shredder.
(Oh, you want the bills intact at the end of the week? Why didn’t ya say so? 
Put them in the shredder’s bin directly, without shredding them. This only works if it’s not transparent. And if you’re the one who takes out the recycling.)
In your offshore bank account in Cayman.
Roll it into a small tube and drop it inside a scuba tank. Replace the valve and refill the cylinder a bit.
Unless you’re driving through New Mexico. They have weird rules about clenching your butt cheeks…
Guess nobody here has ever seen Papillon.