Slippery Tiernan 

When you "accidentally" slip an object (usually a laser gun) between somebodies two butt cheeks.

Guy- "WTF, you just gave me a slippery Tiernan!"
Other Guy- "Sorry, it was an accident."

Guy- "Hehe. I just gave you a Slippery Tiernan."
Loose Girl- "Really? I didn't even notice."

Slippery Tiernan by anonymous1234246623465 October 5, 2011

Slippery Tiernan 

A sex position whereby one party would analy penetrate his or her partner with a firearm. For satisfactory results, one should employ the use of a laser-gun.

Gwedmush. Slippery Tiernan.

Slippery Tiernan by go ahead mush May 15, 2025