Top definition
A euphamism for masterbation. Similar to a Skin Flute.
the act of "rubbing one out". jacking off. stroking it. sowing your own seed
Barney was so lonely on Saturday night, he just sat alone in his living room and played a slow, slippery tune on his KNUCKLE TRUMPET
by e-rips October 08, 2003
Get the mug
Get a Knuckle Trumpet mug for your dog Riley.