Meaning of “bunch (sb/sth) together/up” - Learner’s Dictionary

bunch (sb/sth) together/up

phrasal verb with bunch us uk /bʌnʃ/ verb

to move close together so that you make a tight group, or to make someone or something do this:

[ often passive ] We were all bunched up at the back of the room.

(Definition of “bunch (sb/sth) together/up” from the Cambridge Learner’s Dictionary © Cambridge University Press)