Vain Banger 

Someone who shoots-up dope

Fuck that dirty ass vain bangin' douch bag slut!

Vain Banger by SmackAhoe July 24, 2003

Vain wank 

Wanking while getting off by looking at yourself in the mirror instead of at porn.

He was so in love with himself that instead of looking at porn he had a vain wank.

Vain wank by JakeShears June 17, 2021

vain cow 

“Vain Cow” (adjective, noun)

1. an extension upon the original “cow” insult, except add the “vain”

a) “vain” -To no avail, useless
2.1 useless fat bitch.

2.2 a phrase used to describe an ignorant person when they exert another opinion to the public.

“Oh my god, you aren’t ready for the real world you vain cow”

vain cow by shaolint July 19, 2023

in vain 

something done for nothing, vainly

Dont speak Gods name in vain!

in vain by Dovhyy Nazar January 21, 2015

waiting in vain 

Hopelessly waiting for something/someone that will never be yours.

I was waiting in vain for him to leave his wife.

waiting in vain by BRE11:11 July 5, 2016

main vain 

Main vain refers to a penis. A mans main vain.

"dude, i gotta go drain the main vain" meaning he needs to urinate, piss.

main vain by justout October 2, 2006

Drain the main vain 

1. The act of releasing urine from your penis.

2. The act of releasing semen from your penis

I drained the main vain all over her.

Well, time to drain the main vain

Drain the main vain by Nttm May 19, 2010