Green’s Dictionary of Slang

boasie n.

also boasy
[boasie adj.]
(W.I.)

1. a show-off, a boaster.

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[WI]in Cassidy & LePage Dict. Jam. Eng. (1980).

2. a flashily dressed person.

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[WI]in Cassidy & LePage Dict. Jam. Eng. (1980).