trouser trumpet
"As a hush descended on the dinner room at Hogwarts, just as Dumbledor rose to speak a sudden sharp trouser trumpet honked into the air. Ron Weasley looked as red as a beetroot; In fact, it was Hermione who in typical muggle fashion had done it, but was willing to pass it on to Ron."
trouser trumpet by D F Stuckey July 9, 2004
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