look up any word, like dirty sanchez:
 
1.
a good source of Iron
Damn, your grandma's Yellow Jello
by Kdoggie April 19, 2009
 
2.
It means hi,hello,hey etc

i was tired of saying hi so i started saying yellow jello. and b4 i new it EVERYONE was saying it not just mi friends but also ppl i didnt noe

hi hello howdy
Alex:hey
Zach:yellow jello


Serena:BLAIR!!!
Blair:yellow jello

hey greetings aloha
by preppy_rocker March 15, 2009