Beyonce is “bouncy”
I always wonder why people are taking other people in online games to the pwn shop.
I pronounce it like in U Thant. He wasn’t a very big guy, so I’m always careful not to eat too much at All U Can Eat restaurants.
(Yes, I know U is just an honorific like “Mister” or whatever.)
One time I was in a car with some other people when we saw a skywriter who had already writted out “Jesus Loves U” I said "Hmmm, I wonder if when it’s done it will read ‘Jesus Loves U Thant’. Then, when the skywriter started to write a “T”, I cracked up. It turned out to be an “I”, though, which prompted me to wonder if the phrase was going to be “Jesus Loves U: I think you’re a jerk.”
Horse dow vres
Dowg nuts
Nececelery
So many …A few I can think of off the top of my head.
An tee Q for Antiques.
(stuffy fake french accent) Valooo Veelaaahjjzz for Value Village.
Anything Greek alphabit related. Phi is my favrite cause it rhymes with Fecal.
I pronounce the “u for you” as “uh”. Like the u in the word up. Also, if the pronoun I isn’t capitalized, I say it like the i in hit.
I haven’t seen that show since Whoopie Goldberg replaced Rosie O’Donnell.
Jalapeno? juh LOP in oh
I also do the gym one in the OP.
Thermo-meter
Plastic pronounced as blackdick like in engrish speak, and also I do piedwice alot.
I like to say “snausage” instead of sausage.
I’m also one of those lame people who thinks saying “fajita” and “quesadilla” using English letter sounds is really hilarious.
I also like to use British pronunciation for certain words, like “schedule” (SHEH-dhool).
I like to mispronounce wines, such as the “t” in merlot or pinot.
Would anybody like another champaggin? (thanks to Zapp Brannigan for that one)
Hah! My little grandson does the same (he’s 3 now and learning some correct pronunciations) but eeeeelicious is going to remain in the family lexicon forever I reckon.
And so it should! 
I got this one years ago from my father in law, who hunted an-tell-o-pees (antelope).
Good guacamole is made from ah-VAH-ca-dos.
I always say “Sausages” even if there’s only one - it’s a play on my dog who loves everything and, in my head, to him there should always be more! 
Also, I forgot about the Worcestershire. I always say “Worstachestashire”.
I add a few more. My usual is wust-est-ches-ter-ser-shire, but I try to vary it.
The actor Sean Bean’s name is pronounced Scene Bean in our house. Or, if we are feeling ornery, Shawn Bawn.
I like to say prehaps instead of perhaps… for no good reason other than to sound cute.
I’ve been known to say baffroom instead of bathroom or punkin’ instead of pumpkin, for similar reasons.
Sammich only gets used if I’m purposefully trying to sound dumb or silly like I don’t know how to pronounce things.
Mature (Ma-churrr) becomes Ma-too-er when I’m trying to sound snooty/pretentious.
I had to steal mine.
For the word ‘Gypsy’ I use a hard G, because WC Fields did it that way. Although I use it all too rarely, when I do, it irritates people on a grand scale, just like on his movie.
And then, I steal from Alan on The Hangover, and pronounce the word retard as reTARD.