Pécs

pec

Short for "pectoral muscle," one of the two large, flat muscles that go across one's chest. Typically used in the plural. Wow, my pecs are really sore after that workout!
Farlex Dictionary of Idioms.

pecks

and pecs and pects (pɛk(t)s)
n. the pectoral muscles. (From weightlifting and bodybuilding.) Look at the pecks on that guy!
See also: peck

pecs

verb
See pecks
See also: Pécs
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • pec
  • pecks
  • pects
  • lat
  • lats
  • peeper
  • peepers
  • battleship
  • quads
  • stumps