Definition of hard-on in English:

hard-on

Syllabification: hard-on

noun

vulgar slang
An erection of the penis.

More definitions of hard-on

Definition of hard-on in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day grammarian
Pronunciation: grəˈmɛːrɪən
noun
a person who studies and writes about grammar