NSB
Nasty Sperm Build-up. Often used by guys when explaining it's been awhile since they've had sex.
I'm too tired to go out tonight, but damn do I have NSB.
by RJ August 12, 2005
NSB
NUTTAL SUCKS BALLS THE BEST CLAN IN THE WORLD drunkenbusdriver,
yourdrunkenmom and darkcaps nsb.isgreat.tv
UHHH HEAY GUYS NS UHHH BEEE YEAH nsb.isgreat.tv nsb.isgreat.tv
by George Bush April 04, 2005

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