An action performed by the wing man, this situation arises when the said wing man takes one for the team by hitting on the fat/ugly chick in order to help his buddy/buddies score with her hot friends, and therefore, sacrifices himself by jumping onto the grenade.

The pin is said to be removed from the grenade when one man goes in alone, and the grenade prevents further interaction with the hot chick(s). Therefore, the jumping of the grenade must be performed immediately before all soldiers are blown to smithereens.
The hot chick's fat friend was successful in cock blocking me because by the time my wing man was jumping the grenade, his coverage was not sufficient enough to protect us from the explosion. Attempts in obtaining intel (phone number, email address, conversation, dancing, etc...) have been thwarted.
by Daniel Druff April 14, 2006

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