Top Definition
Seamin is the genes that come out of a man after Wacking off or Bumping Uglies with a women/man.

Slang Terms: Jizz,Man Chowder, cum . Seamin, Mayonnaise
If you've ever arose in the morning and noticed your b.v.m.s are wet is because you had a wet dream last night and seamin came out of your dick.
by Fatty DIng Dong January 23, 2007

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