look up any word, like b4nny:
 
1.
Combination of "jello" and "lol." It has been speculated that this is the expression Bill Cosby uses in text messages as well as internet forums.
P_Rash: Did you see that episode of Mad TV where Aries Spears made fun of Cosby?

B_Cos: Yea jellol
by Justin Herbert April 10, 2009