Interjection used since the 70's as an alternative to swear-words in polite company, also fishwhistle and bogwhistle.
Upon striking thumb accidentally with hammer : 'Pigwhistle !! The bleeding nail moved !!'
by Tom Pearce August 16, 2005
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Communication device ( telephone, email, etc)that jail inmates use to contact those on the outs. This form of communication is always monitored and/or recorded.
Willie steadily be telling everybody business every time he's on the damn pig whistle.
by Peebee Enjay November 23, 2016
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