Top definition
A place on the side of a motorway or dual-carriageway for two beefy male lorry drivers to smash each other's back doors in.
"Breaker breaker - Horny-Shawnie here. Coming up to the gay-by near Marmite Superhighway. Anyone fancy a bum? Over and out"
by ShittierJokes August 10, 2017
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3
Young children adopted by, born to, or raised by a same sex couple.

Singular: Gaby
Lucy: "Are you going to Mark and Eric's on Sunday?"

Sean: "Are you kidding? Of course! Gaybies always have the coolest birthday parties"
by ChiChiMcGee January 04, 2011
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6
the baby of a gay parent or parents
guy 1: Steve is a gayby
guy 2: a WHAT?!
guy 1: he's a child of gay parents.
by graciebby123 July 08, 2009
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