hard-on
hard–on
noun \ˈhärd-ˌȯn, -ˌän\ plural hard–ons
Definition of HARD-ON
sometimes vulgar
: an erection of the penis
See First Known Use of HARD-ON
1888
Browse
Seen & Heard 
What made you want to look up hard-on? Please tell us where you read or heard it (including the quote, if possible).
