A person who follows you around, or invades your space therefore riding your "sack" or "nutsack".
Joeys little brother was hovering around like a little "sack crab"
by LexisMom09 April 13, 2009
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A crab sack is when the meaty cock of a male crab goes inside the anus of a human female, this act of sexual crabercorse is why we have jesus
by CommunistEperson April 5, 2021
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