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To Bertwhistle someon; is to remove clothing from around your rear end and it expose it to the nearest person. Normally an innoccent and unsuspecting women, is the target of a Bertwhistle
Badger shouts "Get your Bertwhistle out" Fodder reply's by dropping his kegs and revealing his booty
by Mark 'Bertwhislte' Smith October 04, 2004
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