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