Courtesy Card

A verb, usually used in the past tense, describing the behavior of waitstaff validating identification for the purpose of age verification before serving alcohol.

This variation of the standard "carding" procedure is used when an overly polite waiter or waitress asks for the identification of a possibly underage patron, then subsequently requests identification from a patron clearly over the legal drinking age.

Waiter (to young looking female patron): "Miss, may I see your ID? Thank you."
Waiter (to female patron's obviously older male companion): "Sir, may I see your ID? Thank you."
Male Patron (to Female Patron): I just got courtesy carded.

Courtesy stretch

Tugging on your man meat to engorge for photo op, ideal for growers not showers

I hope you gave it the courtesy stretch before you sent that snap of your man meat

Courtesy Fluff

Concealing fur surrounding the perimeter of the anus of an animal.

I can't see that long-haired cat's anus at all, it has abundant butt hole courtesy fluff.

Courtesy Lay

When a gentleman has sex with a women out of politeness. See pity fuck.

I'd do her, but more as a courtesy lay.

Courtesy Flush

When a woman douches in-between hookups at a social gathering.

Person one: Dude I heard you got sloppy seconds.
Person two: Nah bro she did a courtesy flush before we did it.

Courtesy flush

flushing the toilet more than once to disguise any bad odors

Wow, John was just in the restroom dropping the kids at the pool...too bad he didn't do a courtesy flush!

Courtesy Clap

The act of awarding someone with a single clap to recognize that they have just said a bad joke.

BadJokeTeller: "Hey guys, (-- bad joke here --)."

Audience: (silence and awkward looks)

Bystander: "Courtesy Clap" (clap)