Usually referred to as "a Blair", refers to a joint containing 5 or more grams of weed. Cannot be rolled in pencil style to be considered a true blair, because a true Blair must get bigger as the joint gets longer.
Stoner 1: Dude lets roll a blair and smoke it all right now
Stoner 2: Fuck ya!
Stoner 1: Dude that blair was awesome, there must have been like 7 grams in there
Stoner 2: Holy shit man im fucking tripping out