you wore a jean vest

to call out somebody's hypocritical and ironic behaviour, quoted by Nicki Minaj circa 2011.

"The jacket gon-"
"The jacket looks great i don't know whatcha talkin' about but every woman in here is gonna like that- please it's- you wore a jean vest"

going vest

at prom or another party at which you wear a vest with other fancy clothing over it but it's way too hot so you take off your blazer/tux/suit/whatever and wear your vest on the outside.

DAMN, this tux is way hotter than I was expecting! As soon as I get to prom tomorrow night I'm going vest.