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1.
1. One of close companionship, in a non-gaymosexual way.

2. Your best friend.

3. A gigantic friend.
Trent: I don't think I can go out tonight.

Jim: Why not?

Trent: I already promised my broskaphorous we'd stay up and play Grand Theft Auto IV all night.
by Trenticles January 30, 2009