roast on you 

There are four main categories of when one would say, "roast on you."
1) they are flirting or be flirted with
2) somebody just told them off, they got burned, or they just said something stupid
3) they burned some one else
4) something amazing or extremely hilarious just happened

Girl: I really love you!
Guy: Your best friend told me that too.

Me: Roast on you!

roast on you by youknowwwhoitis December 8, 2014

don't let me get the roast on you 

Something your fellow classmates or peers say before they proceed to roast your existence usually happens if you try to roast them but fail.

Dude 1: Boy your hairline look like scratch art!
Crowd: Cricket
Dude 2: BOY DON'T LET ME GET THE ROAST ON YOU with your high waters looking ass boy mike wazowski sounding voice ass boy
Crowd: OOOOOHHHHHH!!!!

don't let me get the roast on you by Dankness at its finest July 9, 2017

gravy on your roast 

Ejaculation on a male/females arse

Im going to put my gravy on your roast

gravy on your roast by GhettoChildrensSexEducation May 24, 2017