Hard on

n.

Heard in Waterford

An extremely erect penis.

In use

Jaysis boy, who needs Viagra... one look at her arse going up to get communion and all de oul lads at mass have to cross their legs to hide de hard on dey gets.

Posh English

Good heavens my good fellow, who requires pharmaceutical assistance when a single glance at her posterior ascending to receive communion compels all the elderly gentlemen at mass to cross their legs and conceal their tumescent male member.