Definitions:
a person who has abandoned a course of study or who has rejected conventional society to pursue an alternative lifestyle

the restarting of play with a drop kick.

a momentary loss of recorded audio signal or an error in reading data on a magnetic tape or disk, usually due to a flaw in the coating.

a u-shaped slot at the end of a fork or stay on a bicycle, made to receive the axle and enabling the wheel to be changed rapidly.