不分系

bùfēnxì
to enroll without declaring one's major or department (in one's first year(s) of university)

CEDICT

Entry Composition

1 不分 bùfēn
  1. not to distinguish; to make no distinction
  2. (LGBT slang) versatile (open to either penetrative or receptive role)
=2 系 xì
  1. to connect
  2. to relate to
  3. to tie up
  4. to bind
  5. to be (literary)
=2 系 xì
  1. system
  2. department
  3. faculty
=2 系 xì
  1. to connect
  2. to arrest
  3. to worry