a slang term for a vagina.

shellder is the pokemon that most closely resembles a vagina.
"dude, i was chillin with jenny and she straight up showed me her shellder. so i whipped out my squirtle and we boned right there on the spot!"
by austin :OOO October 6, 2009
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APokemon that looks like a scallop and likes to bite people in their butts while they're tured around. They like sticking out their tongues and can be heard at night yelling SHELLLLLLLLLLLLDERRR! in very high-pitched voices.
Shellder bit the gay mail man in his butt, so now the gay mail man has a new pet.
by RatchetBoo April 28, 2003
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