fun night stand 

A more appropriate and misogynistic term for a one night stand. Often offered to unsuspecting women as a joke in serious conversation.

I figured it was just gonna be a fun night stand, now I have twins. I hate my life.

fun night stand by JPISU August 10, 2007

fun-night-stand 

a short term amorous encounter that neither party regrets the next day

(as opposed to the often negative connotation of 'one night stand')

"yeah it was a one-off thing, just a fun-night-stand"

"we met in a bar, and it kind of led to a fun-night-stand"

"Kerry and Steve had a fun-night-stand when they were in college"

fun-night-stand by Merchant M October 24, 2013