hard-on

from WordNet (r) 3.0 (2006)
hard-on
    n 1: an erect penis [syn: {erection}, {hard-on}]
from The Collaborative International Dictionary of English v.0.48
hard-on \hard-on\ n.
   An erect penis; a penile erection. [slang or vulgar]

   Syn: erection.
        [WordNet 1.5]
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