1informal, rare Having prominent, fleshy jowls; jowly.
2Welsh informal Inclined to talk a lot, especially in a rude, insolent, or belligerent way; loud-mouthed.
3informal Of music (especially jazz) or a musical performer: displaying or characterized by technical virtuosity; having or demonstrating impressive ‘chops’.
1960s; earliest use found in Gwyn Jones (1907–1999), writer and viking scholar. From the plural of chop + -y.