A form of non-bacterial endocarditis seen in systemic lupus erythematosus (SLE), and the most common cardiac presentation of that disorder.

plural of back, crack and sack

(UK, historical games) A children's dogpile game played in Oxfordshire and other areas of Britain.

(UK, historical games) Alternative form of more sacks to the mill.

plural of sack o' shit

(slang) To go to bed.

Alternative form of hacky sack

(US) A bag of marijuana costing $20.

(uncountable, games) A game or activity in which one or a group of players try to keep a footbag off the ground using only the feet. / (countable) The footbag used for such a game.

(slang, vulgar) The scrotum.