Inspired by my “WWJD For A Klondike Bar?” shirt.
Just yesterday I saw somebody with one that read “The Guy That Killed Hitler Was A Real Asshole”.
Which ones have you personally seen? Please, no links to companies that print shirts-This is about what you have seen.
My favorite shirt until it wore out and fell to pieces said:
No, I will not fix your computer.
I used to wear it to parties.
I have several.
Front: “Help is on the way.” Back: “Help is heading out the door.” (I was in IT.)
“National Sarcasm Society. Like we need your help.”
“Salvador Dalek” (A picture of melting Daleks from Doctor Who a la Dali’s “The Persistence of Memory.”)
A shirt with the entire “Who’s on First” routine on the back.
A picture of ET’s bicycle towing the TARDIS by Tom Baker’s scarf.
A parody of the Arm and Hammer logo with the words “By Grabthar’s Hammer. What savings!”
“I make Things Up” (I’m an author).
A coworker wears one that says “In my defense, I was left unsupervised”
One of my current shirts says
“Am I perfect?
No.
Am I trying to be a better person?
Also no.”
When I was in pharmacy school, I had a t-shirt, which I’m pretty sure is packed away somewhere, that said “LSD” in big letters, and “ets tudy rugs” in small letters underneath. I also had a Sandra Boynton cartoon t-shirt captioned “Lifestyles Of The Broke and Obscure” which had one of her cats elbows-deep in a sink of dishes.
Around the same time, early 1990s, there were t-shirts that had various animate or inanimate objects having sex in different positions. My favorite story about them came from a junior high teacher who said that one of his students, one that surprised everyone, came to school wearing such a shirt, and she was called into the principal’s office and told that she had to turn that shirt inside out, and why. It turned out that she really liked lizards, and HER MOTHER had bought her that shirt, not realizing what they were all doing!
One of my high school classmates, back in the day, had a t-shirt that looked like the adidas logo, but it actually said “adidn’t.” Never saw it anywhere else.
Inspired by the crowds and some religious t shirts when I was in Nashville recently.
On the back in large letters “God Bless You”
And in much smaller letters “If that was you who just sneezed on my neck”
I’m not much for wearing funny t-shirts, but I thought about having that printed up.
CW
.5 FAST
Bold white type on a black T-shirt.
I really got a kick outta seeing that.
I saw a guy wearing a t-shirt that said:
SOLVEM
PROBLER
Thought that was pretty clever.
I have one with a picture of a smiling cartoon puppy and kitten and the text is “Life is meaningless, everything dies”.
This is one I own that I absolutely love seeing people’s reactions to;
Half-assed? Took me a minute 
A few years ago my daughter gave me one that had a cartoon of a rodent leading a donkey that said “I Don’t Give a…”
I’m still not sure how to take that.
I have a t shirt with a picture of a smiling cartoon whale with curly brown hair.
Above it are the words “Perm Whale”
I like to wear my “Participation Trophy Husband” shirt whenever missus takes me to the plant store.
There’s the one with the extended weather forecast for Alderaan
Monday = 72 & partly cloudy, Tuesday 74 & sunny, Wednesday 15,000 & explosion
My dear friend @The_Butterfly_s_Ghost gave me some funny t-shirts. One is picturing Wile E. Coyote with a typical cartoon trigger box for explosives and his hands on the push-down trigger, with the caption “Trust me, I’m an engineer”. Of course I’m an engineer.
The other one just has the caption “Just shy, not anti-social. You can talk to me”. I wore it at their next birthday party, and indeed some guy I didn’t know started a conversation after seeing it with “Let me guess, you’re an IT guy”. And of course he was right.
I saw a kid at Gen Con with a T-shirt that had a picture of the periodic table, with the caption “I wear this shirt periodically.”
I’ve got a large collection of nerdy tshirts. I think my favorite is “I’m not slacking off, my code’s compiling,” from XKCD.
This one isn’t funny on its own, but rather a funny combination of tshirts. Years ago I was standing in line for something, and noticed the guy in front of me was wearing an infowars.com tshirt. And then I remembered that I was wearing my snopes.com tshirt.
Another of my old favorites is my “Sudo, Make Me a Sandwich” shirt.
Years ago I bought a t-shirt while vacationing in the Black Hills of South Dakota.
On the front was a drawing of Mt. Rushmore.
On the back was a drawing similar to this:
