Top definition
the act of taking your foot
putting the big toe in a woman's vagina. simultaneously putting the pinky toe in her ass..and pinching.
"hey you know the head cheerleader at school? i gave her a krusty crab last night!"

"no way dude!"
by balh! September 05, 2008
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2
when you have sex with a krusty vagina with crabs which then transfers to your dick.
That girl gave ma a krusty crab last nite it was wack.
by vkp January 26, 2008
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3
When sweat, soap, or dirt get caked under your ball sack and causes it to crust.
Being defined as, "Oh man, that dirty job gave me a severe case of the Krusty Crab."
by LissaBug April 06, 2017
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