Top Definition
1) SpongeBob SquarePants but lacking the SquarePants.

2) Someone who refrains from wearing underwear under their outer clothing (i.e. to go 'commando', 'freeballing' - in the case of men not wearing underwear, and 'freebuffing' - in the case of women) to covertly create a frisson of sexual excitement or amusement amongst friends, sexual partners, future sexual partners, etc.
Lydia is a SpongeBob NudiePants tonight!
by Lydia Bartlett May 02, 2008
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