a horn that used by a guy to warn other guys know that a grenade (ugly chick) is in the area.
Thank God Paulie sounded off the Grenade Horn so I could hide from her before she saw me.
by kidlou January 23, 2011
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A horn that alerts all of Seaside Heights that there is a grenade walking around.
I spotted a grenade walking towards the club, so I immediately grabbed the Grenade Horn to warn all the club patrons.
by ThePerfecttSet January 22, 2011
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