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4. I.B.
Abbreviation for in bed. Usually safe to use when within earshot of parents, teachers, or anyone else who may disapprove if they heard the actual joke.
Student 1: "All this work is killing me!"
Student 2: (notices teacher nearby) "I.B."
1. I.B.
Kids with giant ass backpacks that usually go out 3 times their body's width.Usually resulting in back problems in the future.
That bag is frikin' huge. It's really I.B.
2. I.B.
A substitution of the first two letters of "irritable bowel" as the initials of someone who always has to take a shit at the worst time
I.B. Clarkson (Irritable Bowel Clarkson) could not hold it until the next exit, so he had to take a shit in the woods.
3. I.B.
INSTANT BONER- refers to a female that can make a mans man stand to attention..
As soon as Alika walked in the room i knew she was an I.B.
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