Rifle Wedding 

A sudden or hurried marriage because a family member, especially grandparent is on their deathbed.

The doctors said that grandma only had a year left to live, so we had a rifle wedding while she was still alive.

Rifle Wedding by The Real Nerdbomber September 20, 2022

Assault Rifle Wedding 

worse than a shotgun wedding...

I'd rather have a shotgun wedding than an assault rifle wedding.

the halo 3 assault rifle is for n00bs

Assault Rifle Wedding by Gambit3896 August 17, 2010