scarper

Short definition from Wiktionary

Verb

1. 1
   Chiefly in scarper the letty: to depart quickly or run away from (a place); to flee.
2. 2
   To depart quickly; to escape, to flee, to run away.

Noun

1. 1
   Chiefly in do a scarper: an act of departing quickly or running away; an escape, a flight.