bunch up

Verb	1.	bunch up - form into a bunch; "The frightened children bunched together in the corner of the classroom" Synonyms: bunch, bunch together
	2.	bunch up - gather or cause to gather into a cluster; "She bunched her fingers into a fist"; "The students bunched up at the registration desk" Synonyms: bunch, bundle, cluster, clump

bunch, bunch together, clump, cluster, constellate, flock