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1. A group, gang, or other collection of males who attempt to round up, lasso, or otherwise capture hot, young, and unblemished females for the purpose of sexual activity.

2. A group, gang, or other collection of males who attempt to round up, lasso, or otherwise capture, hot, young, and unblemished dam-building rodents.
The prettier 8th grade girls were always worried that one of the neighborhood's many beaver posses might catch and fuck them on their way to school.
by The Real Champ March 31, 2007
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