quarter-pounder

Short definition from Wiktionary

Noun

1. 1
   A beef hamburger whose patty weighed approximately a quarter of a pound before cooking.
2. 2
   A burger with a patty of such uncooked weight, of an alternative to beef.
3. 3
   A burger patty of such uncooked weight.
4. 4
   A food item similar to a burger patty of such uncooked weight, such as a meatball.
5. 5
   A sandwich weighing approximately a quarter of a pound.
6. 6
   Used other than figuratively or idiomatically: see quarter, pounder: Anything weighing a quarter of a pound.

Adjective

1. 1
   Having a weight of a 1/4 of a pound