noun, plural hard-ons.Slang: Vulgar.
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Origin of hard-on
Example sentences from the Web for hard-on
Doctor Hardon apparently thought it could, for there was a strange smile upon his countenance.
Oh, say, did you hear about the time Will Hardon had with the Dicky, last week?Brenda, Her School and Her Club|Helen Leah Reed
It never rains but it pours, and the storm fell heavily now upon the head of Doctor Hardon of Somesham.
My name is Hardon; I came to see my father for the last time.
Doctor Hardon turned almost purple with rage, but by an effort he choked it down.
Idioms and Phrases with hard-on
Also, hard upon, hard by. In close proximity, as in The police were hard on the heels of the thieves, or It was hard upon three o'clock, or Their house is hard by ours. The variants are used less than hard on. [Second half of 1700s]
be hard on. Deal severely with, cause damage to. For example, He asked the teacher not to be too hard on those who forgot the assignment, or That cat has really been hard on the upholstery. [Second half of 1600s] Also see hard time, def. 2.