hard-on

[hahrd-on, -awn]

noun, plural hard-ons. Slang: Vulgar.

Origin of hard-on

First recorded in 1890–95

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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
My name is Hardon; I came to see my father for the last time.
Mad
George Manville Fenn
Doctor Hardon apparently thought it could, for there was a strange smile upon his countenance.
Mad
George Manville Fenn
Doctor Hardon, portly and comfortable-looking, sat reading the evening paper just delivered from the stationer.
Mad
George Manville Fenn
It never rains but it pours, and the storm fell heavily now upon the head of Doctor Hardon of Somesham.
Mad
George Manville Fenn