Search Result for "hard-on": 
Wordnet 3.0

NOUN (1)

1. an erect penis;
[syn: erection, hard-on]



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]


WordNet (r) 3.0 (2006):

hard-on
    n 1: an erect penis [syn: erection, hard-on]