蹭課

蹭课
cèngkè
(coll.) to sit in on a class

CEDICT

colloquial

Entry Composition

1 蹭 cèng
  1. to rub against
  2. to walk slowly
  3. (coll.) to freeload
2 課 kè
  1. subject
  2. course
  3. class
  4. lesson
  5. to levy
  6. tax
  7. form of divination

classifiers: 門, 堂, 節