Similar to a night cap but with wine, usually moms or women. The wine helps them relax and unwind from their chaotic day, and prevents them from going full psycho bitch on their spouse or man friend because of a build up of resentment.
Neighbor Friend 1: Hey Jess want to have a wine cap on the porch?
Neighbor Friend 2: Yeah, Ill be down in a minute, I'm gonna need a bottle cap after the day i've had, i almost lost my shit on him.
Neighbor Friend 1: Oh, know what did he say/do?