Definition of Molson muscle in English:

Molson muscle

(also Molson's muscle)

Pronunciation /ˈməʊls(ə)n ˌmʌs(ə)l/

noun

informal Canadian
  • A paunch caused by drinking beer, a beer belly.

Origin

1980s; earliest use found in The Toronto Star. From Molson, the trademark of a Canadian brand of beer + muscle.