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Someone who brings up a dare and tells another person to do it. When the person that brought up the dare their self doesn't do it, they will be name a gibberman.

Geoff: Dude, broskey, I dare you to go watch 2 girls 1 cup.
Winslow: Dude, no you go watch it, broheem!
Geoff: Dude, no way, bro!
Winslow: Dude, now you're just being a gibberman!
by ChÆz-E Püffs February 21, 2009
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