" belts up "

 [ "Belt up" ]

1: It's the British version of shut up.

  * e.g.,  ...  She told the students to belt up because they were making so much noise. 

 [ "Belt up" ]

2: Could also mean 'fasten your seatbelt'.

  * e.g.,  ...  I told the kids to BELT UP before I started the car. 

 [ "belt up" ]

1: british slang for shut up, a rude way to tell someone to be quiet.

  * e.g.,  ... belt up you bloody crony 

 [ "Belt up" ]

1: Going to shoot up (ice etc), particularly tightening a belt around forearm to highlight veins (as nurses do)

  * e.g.,  ... "Ay der Marko bruva, we going to belt up or what cuz?!" 

 [ "belt it up your arse" ]

1: Australian version of "stick/shove/ram/cram/jam/poke it up your arse"

  * e.g.,  ... Belt it up your arse: "When the mechanic told me it was gonna cost five hundred bucks to fix me car, I told him to belt it up his arse." 

 [ "Belt me up" ]

1: When a person is about to fight and they want someone to hold them back. It’s basically saying hold me back like a belt holds up pants, or a seat belt holds up back.

  * e.g.,  ... Yo girl you need to belt me up now!