Crossword clues for belt up
Wiktionary
belt up
vb. 1 (context British English) To fasten one's seat belt. 2 (context British usually in imperative English) To stop talking or chattering; shut up.
WordNet
Usage examples of "belt up".
The men had to work as a close team, taking two steps in unison and hitching the big belt up together.
Tanyne tossed the belt up against the door and strode away, singing softly.