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The physical condition in which ones scrotum is shriveled, wrinkled, and just straight up shrunk. One obtains a cougal sack from various conditions not limited to, cold ass water, cold ass wind, and rolling in the snow nude after a nice sauna session.
damn I didn't know the lake would be this could during summer, my sack has gone full cougal sack.

Guy: Wow, that ladies chin really looks like a shriveled up scrotum!

Friend: hey man I agree but don't you mean it looks like a cougal sack?
by jakaoby January 19, 2017
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