To tell someone off with a bad ass comeback.
Roast:

Boy: "kill yourself"

Girl: "if I wanted to kill myself I'd climb your Ego and jump to your IQ"
by Nikki Fazbear November 21, 2016
To humorously mock or humiliate someone with a well-timed joke, diss or comeback.

Noun form: the aforementioned joke, diss or comeback.

See also sizzle
"When Gonzo got drunk, he made fun of John's ugly-ass suit--it was a delicious roast."
by Creff von Crinklepants December 7, 2005
What is yelled when someone just received an insult. Basically a burn, but more severe.
Did you see Jake in gym class, he tried to call Ben ugly, but he came back and roasted him.

OR
Jake: Ben your so ugly.
Ben: You sure about that bud, why don't you go look in the mirror.
by imakedawurdzondiswebzeit May 13, 2015
Used to define the hot temperature outside.
Guy 1:lads its quare warm today!
Guy 2:ye lad its roast!
by FairOrgan May 29, 2011
An individual who doesn't abide by the social norms of civilized society.
''Did you see those roasts in pure last night? Grinding up against anything they could find''.
by Dickbutter93 December 24, 2012
Someone with a strong farming background, no regard for their appearance, basically born and raised lifting sheep and getting 'stuck in' with all elements of the farming area. Have no recognition of the proper manner which should be used in Civilized area, such as: Cities, Pubs (that are situated in the middle of nowhere), Off Licences, Nightclubs and just about anywhere you can think of that is not a Farm or a car park with loud exhausts and Subaru jackets. There dress sense generally consists of: Blue bootcut jeans, A checkered shirt, A car enthusiast jacket of some sort (occasionally can be truck or motherbike related!), A set of sandy caterpillar Dessert Boots (but in modern day they have branched into such brands as Timberland!) If for example they are not wearing a shirt you can guarantee they will have some sort of crude demeaning remark written across there t-shirt such as: 'If Found return to pub!' or 'Save water drink BEER!' these are generally purchased in the roasted clothing shop of TJS jeanscene which supplies Farm Animals all over Ireland with all there daily clothing needs! They generally accompany walking down civilized streets with screams such as 'WEH WOW WOOO' If you feel like just having a listen to some ROAST please just log into I-102-104 aka I radio!! this is when the roasts hit the airwaves!!
'Look at the filthy ROAST over there man'

'Oh my god what a farm animal and a roast!'

'What girl is seriously gonna find that ROAST attractive'

the list is endless
by Shanny-fanta October 5, 2010
Roast - to go "roast" is to completely abandon a community or any responsibility that you have.
E.G Jimmy went Roast on his class project - never turned up to help them, ignored everyone involved on it and it eventually broke down and failed.
by insideman June 21, 2014