Definition of the sack
chiefly US, informal
: a person's bed He's still in the sack. Should I wake him? You look tired. I think it's time to hit the sack. —often used in the context of someone's sexual experience She has a reputation for being good/great in the sack. He's ready to jump/climb in the sack with any woman who'll have him.
Word by Word Definitions
: a usually rectangular-shaped bag (as of paper, burlap, or canvas)
: the amount contained in a sack
: a fixed amount of a commodity used as a unit of measure
: to put in or as if in a sack
: to dismiss especially summarily
: to tackle (the quarterback) behind the line of scrimmage in football
: any of several white wines imported to England from Spain and the Canary Islands during the 16th and 17th centuries
: to plunder (a place, such as a town) especially after capture
: to strip of valuables : loot
: the plundering of a captured town
Seen and Heard
What made you want to look up the sack? Please tell us where you read or heard it (including the quote, if possible).