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1.
1. The natural organisation of males into packs to maintain stability during the quest for female attention . These are often groups of three to seven men led by an alpha male.

2. The tendency for groups of individuals to act together without planned direction.
1. "She couldn't ressist the pack mentality"
2. "The other guys just stopped and watched true masters instigate some great pack mentality"
by SaintReeves October 01, 2010