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The state of ones penis after sex when it is abnormally heavier than usual even though it is no longer erect.
Man #1: Yo, why is your dick so heavy?
Man #2: Because I gotta hephty.
Man #1: Oh, no wonder.

Woman #1: Jimmy's hephty lasted for an hour last night.
Woman #2: What's a hephty?
Woman #1: Oh, that's what you call a dick for the period when it's abnormally heavy after sex.
Woman #2: Oh, OK.
by Killa Phorilla February 21, 2009
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