|1.||Shut your beak|
An adage used pejoratively to denote someone who exhibits incessant qualities.
Dude1 "Oi bruv your a dickhead!"
Dude2 "Man, SHUT YOUR BEAK!"
|2.||shut your beak|
to shut up; be quiet, close your mouth as your being told.
dude: hey man, you owe me money!
guy: shut your beak! i'll get it to you later.