Frequently Activated Rectal Tremble 

Reverse acronym for fart.

Dude, Jorge has Frequently Activated Rectal Trembles. He smells like a pollcat.

Frequently Activated Rectal Tremble by keifermail June 29, 2009

tribble 

A creature from Star Trek that breeds like crazy. Wiped out by the Klingons, but a starship from the future brought one back into its own time, thus restoring the species.

Tribbles are so cute but so prolific.

tribble by Korora November 17, 2003

knee-trembler

Sexual act with one or both partners standing

The two lovers stood in the stairwell and had a quick knee-trembler

knee-trembler by Spiked + "C.J. Beck" 8 March 2006 April 15, 2006

Tribble Effect 

A phenomenon that occurs when in Star Trek Online, someone pets their tribble, and others nearby proceed to follow suit.

I went into a crowded space, and petted my tribble. Nearly everyone else nearby who had a tribble petted theirs, as well. Thus, the Tribble Effect.

Tribble Effect by B33R Train June 10, 2010

knee-trembler

quick sex done in an alley behind a bar. see the book anglea's ashes for reference. first chapter

knee-trembler by Michelle August 21, 2003

Dubble Bubble Trubble 

n. a sexual act that entails sticking pre-chewed bubblegum in the anus of another and asking him/her to contract the pubococcygeus muscle to give the appearance of 'chewing'.

Him: Let's try something new...
Her: Like what?
Him: *chews bubblegum*
Her: What are you doing with that?
Him: *sticks bubblegum wad in her asshole*
Him: DUBBLE BUBBLE TRUBBLE!!!!

Dubble Bubble Trubble by 800Wmarietta October 23, 2011

Treble hook 

To have vaginal sex with a woman while inserting your thumb in her ass in a hook like manner, doing the same with your other thumb in her mouth with a slight tug simulating the effect of a fish hook.

Jeff said to Corey, "Hey bro! I totally gave Nicole the treble hook last night!"

Treble hook by Jeff aka the Treble Hook King May 12, 2014