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1.
4B
A reference to a period in time in which difficult group work is heavily procrastinated, and very little to no work is completed instead. This time typically ends up being the foundation for intriguing discussions and sexual conversations.
"I can't wait for 4B. I could really use a break"

"4B is going to be very interesting today. We're going to discuss how to cockulate."
by Incognito1380 December 22, 2013
 
2.
4b
A reference to a period in time in which difficult group work is heavily procrastinated, and very little to no work is completed instead. This time typically ends up being the foundation for intriguing discussions and sexual conversations.
"I can't wait for 4B. I could really use a break"

"4B is going to be very interesting today. We're going to discuss how to cockulate."
by CoronA2 December 22, 2013
 
3.
4b
could be a soft pencil. Or it could be an American nymphomaniac. The pencil is softer the larger the number. The American nympho is soft on the inside too, and very wet. 4b is the definition of the softest wettest vagina.
Fook moi, I would love to chew on a 4b's soft bits, perhaps on a mat on the floor.
by tastytangerine July 25, 2010