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The Winchester Whistler is defined as follows: Two partners bare buttocks are each clenched together as tightly as possible whilst being pressed against each other's buttocks. Once maximum pressure has been achieved, each person releases flatulence at the exact same moment creating a "whistling" sound as the flatus escapes through the tightly sealed spaces.
"My, Harold, my buttcheeks certainly feel sore from that winchester whistler last night."
by transdelusional sex alchemist October 01, 2007