Definition of belt up in English:

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belt up

British informal
1 [usually in imperative] Be quiet: for God’s sake, belt up
More example sentences
  • He is the last person in the world to ever contemplate telling the President to belt up!
  • So maybe we should just belt up and show you the script.
  • She complained about it being a bit painful but as true caring parents, we told her to belt up and get to bed.
be quiet, quieten down, be silent, fall silent, hush, stop talking, hold your tongue, keep your lips sealed
informal shut up, shut your face, shut your mouth, shut your trap, button your lip, pipe down, cut the cackle, put a sock in it, give it a rest
British informal shut your gob, wrap it up, wrap up
North American informal save it, can it
2Put on a seat belt: all youngsters will have to belt up in cars, vans, and lorries
More example sentences
  • We want people to feel uncomfortable if they have not belted up; wearing a seat belt is part of driving,’ she said.
  • Ford Dealers of Ireland are supporting the National Safety Council in a new seatbelt campaign aimed at encouraging the 43% of Irish motorists who never wear a seatbelt to belt up.
  • More than 55,500 unborn babies could be at risk every year because mums-to-be are not belting up in their cars, fearing it could harm their children, according to new research.
See parent entry: belt
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