When a guy cums on a girl and she surprises him by smacking the cum and splashing it on the guy, like he's in the front row at Sea World.
by Charles Mili June 4, 2017

A fucking terrible person. The name shamus is only given to actual human scum. In most cases someone named shamus lies and cheats. People with the name shamus cheat on you with Claire and drunk call you saying that they still love you.
Shamus is a knob gobbler.
by Fuck Claire May 19, 2018

by your mom April 7, 2003

by abcorder32 March 27, 2009

by Amethyst February 1, 2018

Having sexual intercourse with someone while playing the bagpipes. This does not usually attract many bystanders therefore it is useful when wanting some privacy
You should have heard it, my parents were doing the Uncle Shamus last night, I had to get out of there
by RadientEclipse June 28, 2011

When a man ejaculates into a womans pie hole and she proceeds to spray it back into his face as revenge.
by caitatron June 26, 2009
