To roast someone in a playful manner in order to maintain good relations with them. Furthermore, a toast may be given to someone if they are too much of a pussy to handle a whole roast.
John: I can'tbelieve Jo(e) would toast me in front of my friends Steve: At least it wasn't a roast!
A variation on the term 'repost' which has stuck. On the You Laugh, You LoseFacebook group, instead of just typing "repost" on a familiar picture, members would type variations, the most popular and lasting being 'toast'. Coined by Nigel Lewis Hassell.