So jelly I'm jam

Jelly is a slang word that derived from the word "jealous".
It's a play on words: you're so jelly you turn into jam. Basically saying that you're extremely or beyond envious.

Mostly used in a joking manner and among females.

1: I'm so jelly I'm jam, that you're on vacation right now Beth.

by iknowthings100 March 29, 2013