A JB stands for any one of these:
1. Jiggly Bailey 2. A Jelly Belly
3. Jiggly Belly
4. Jelly Boy Etc...any two words that start with the letter J and B and that designate an oversized person.
One may call another a JB when this person is plump and overweight
The JB could not jump over the fence when we were running away form the cops.
Short, gangster-speak, for Jack-in-the-Box family delicacy restaurant. Here you can purchase delcious gourmet sandwiches for as cheap s 99 cents. There are also the infamous JB taco duo, 2 for 1 dolla. Nothing beats the JB bizzotches.
Kevin: Hey, lets go to JB.
Alex: Ok.
Roy: Yessssssss.