蹭

to dillydally; slow-going

to rub lightly; to move slowly; to dawdle; to dillydally; to pester; to nag

to freeload for food

to cadge a meal

(coll.) (often derog.) to piggyback on (sb's) popularity; to exploit (sb's) popularity to attract attention to oneself

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

(coll.) to sit in on a class

(literary) to encounter setbacks; to have bad luck

(coll.) to ride in sb else's car to save money; to ride on a train or bus without buying a ticket (fare-dodging)

(coll.) to mooch a meal

(esp. of a vehicle) to scrape against; to sideswipe

see 刮蹭[gua1 ceng4]