Everybody can chop pork but nobody can pea soup.
The spelling and pronunciation.
How they process things.
Everyone can roast beef, but no one can pea soup.
You can mash potatoes, but you can't pee soup. (sorry sorry. Really. I've loved this joke since I was... oh.. six...)
Inflate it.
On Saint Patrick's Day everybody wants to be Irish.
Only one but he'll tell everybody.
Because it ran out of cluck!
Souperb.
Kermit's Finger.
Kermit the Frog
No-one cries when you chop up an accordion.