Weeknighter 

A weeknighter is a girl/guy you only hook up with during the week when your friends are not around so you wont have to face the epic amount of shame, humiliation and torture they will make sure you feel.

I can't call him to come out- it's friday.. he's a weeknighter.

Weeknighter by dizzlesize November 14, 2010

One Week Nighter 

When you smash a girl for one entire week every night,but then dump her the following week

Xavier: Would you have a one nighter with Tasha?
Adam: Nah, I'm finna have a one week nighter with her.

One Week Nighter by Yoooooolmaooo June 5, 2018