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1.
A seater refers to a pillion ride on the seat of a bicycle. Also known as a 'backie'.
Boy one: "Awww go on, gimme a seater my bike's got a flat tyre!"

Boy two: "Ummm... Nah. To be honest, i've never really liked you all that much."

Boy two cycles away.
by Eradeziel March 02, 2006