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1.
To be betrayed, backstabbed, dissed, or punked by a someone you thought loyal.
Usually it's bros before hos, but Eddy torpedoed me with that bitch.
by mcgggggg May 31, 2005
 
2.
1. To discourage a girl from giving some action to a male friend

Being torpedoed is similar to being cockblocked, but the culprit is another male friend who is also interested in the same girl. Usually the girl is less interested in that other friend; therefore, he tries to ruin his friend’s chances too.
WTF? Ken just torpedoed Keith's chances with Trinity. That was just a damn mean thing to do!
by Hardin Long April 14, 2004