Hard Swapping 

When you trade sexual partners.. as opposed to soft swap where you just watch, or be watched, the other couple having sex. Sometimes soft swap does entail the trading of oral sex between the different couples.

M and L are into Hard Swapping at their swing parties.

Hard Swapping by surgiomx March 25, 2009

Vein Stamping 

Repeatedly smacking your girlfriend in the lips with your stiff, rigid, veiny penis.

Rachel sucked me off last night. After nutting her chin, I did a little vein stamping. Her lips are a little sore and chapped today.

Vein Stamping by Eaton Holgoode April 24, 2017

slug stamping 

"The female equivilent (sic) of Tea Bagging" (according to Wikipedia's entry for "Teabagging" as of 19 March 2009); ergo, the act of pressing ("stamping") the vagina against the mouth or on or around the face (including the top of the head) of another person, often in a repeated in-and-out motion as in irrumatio. This practice can leave a pattern of viscous moisture on the recipient's face or head, vaguely reminiscent of a slight trail of slime a slug would leave were it to travel around someone's face/head.
Although this term is acknowledged in Wikipedia, it does not seem to be prevalent on the internet at this time.

Mary spent quality foreplay time slug stamping Pat before fully grinding her 'gina on her lover's mouth.

slug stamping by FreePussy Cassini April 1, 2009

wife swapping

The act of two or more couples swapping mates for sexual gratification for some period of time, usually a noght or weekend. Sometimes it is done in the same place and other times the couples go back to either the woman's or the man's residence to be more private.

Next weekend Jim is going to Frank and Sue's home while Frank comes to Jim's home to have sex with Jan during their semi-annual wife swapping party. Frank enjoys having sex with Sue because she is so cute, but really loves his wife Jan.

wife swapping by BRD October 10, 2004

swapping jake

The act of one man spreading another mans ass cheeks, then proceeding to deficate in the other mans asshole.

Jason spread Robert’s Ass cheeks eagerly so he could shit in his asshole. Swapping jake is what they loved.

swapping jake by Slyspark March 14, 2018

mushroom stamping 

The act of pressing the head of ones penis into another persons forehead or other facial area.

As soon as Ben passed out, Jer proceeded to mushroom stamp him to no avail.

mushroom stamping by Snapdragon August 8, 2003

Swapping sauce 

To make out with someone

Yeah dude, last night I was totally swapping sauce with that babe after we went to another room.

Swapping sauce by c0smic September 18, 2013