蹭網

蹭网
cèngwǎng
(coll.) to use sb else's Internet connection (with or without permission)

CEDICT

colloquial

Entry Composition

1 蹭 cèng
  1. to rub against
  2. to walk slowly
  3. (coll.) to freeload
2 網 wǎng
  1. net
  2. network