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a fictional animal that is commonly found on sheets along with other fictional animals whos names start with a letter of the alphabet to teach young children how to spell in bed.
why the fuck does you sheet-door have an animal called seapoon on it.
by boobs mcgee May 27, 2005
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2
An underwater sea creature often apperaing on sheets.
Whoa, did you just see that seapoon. That's probably a once in a lifetime thing.
by Jose Joselo October 09, 2005
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