leaver
departer
goer
exiter
offski
departee
off like a dirty shirt
retreater
fleer
withdrawer
apopemptic
outgoer
go off
jet
trot off
vanisher
get going
leave behind
make like a banana and split
toddle off
make like a tree and leave
dash
haul tail
hit the trail
gone
AWOL
going
exiting
escapee
returner
take a hike
on the wing
departing
bugger off
take off
go on one's merry way
go about one's day
way-going
make one's exit
peace out
cut one's stick
disappearer
take leave
take one's leave
take wing
go about one's business
bust a move
trail
desolate
runner