twack

twack

1. A collective noun for a group of ducks. I started eating my bread on the park bench, and a twack of ducks came over looking to be fed.
2. informal A hard, sharp blow, especially with something flat; a thwack. She gave me a twack on the head for saying she looked chubby in her new jeans. Sometimes the old engine just needs a little twack to get running.
3. informal The sound made by such a blow. He slipped on the ice and hit his head on the pavement with a loud twack.
4. slang A twelve-pack (of beer). I'll bring a twack of Bud Light to the barbecue tomorrow. He got caught trying to buy a twack of beer with a fake ID.
Farlex Dictionary of Idioms.

twack

n. a twelve pack of beer (cans). (Twelve + pack.) Let’s pick up a couple of twacks for the game.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • make ducks and drakes of
  • make ducks and drakes of (something)
  • row
  • play ducks and drakes with
  • play ducks and drakes with (one)
  • lovely weather for ducks
  • have all (of) (one's) ducks in a row
  • play ducks and drakes with someone
  • get one's ducks in a row
  • get your ducks in a row
References in periodicals archive
Word from overseas like 'twack' have also been incorporated.
Apparently, twacks are shoppers who look at goods, inquire about the prices but never buy anything.
Lost English words rediscovered in new book 'The Wonder of Whiffling'
these twacks must have been made by two clusters of dewanged, one-legged miniature animals, hopping acwoss the countwy, jumping fwom one shoepwint to the next..."
Whicker's world down under