'slip away' definitions:

Definition of 'slip away'

verb

Leave furtively and stealthily; "The lecture was boring and many students slipped out when the instructor turned towards the blackboard" [syn: slip away, steal away, sneak away, sneak off, sneak out]

verb

Pass by; "three years elapsed" [syn: elapse, lapse, pass, slip by, glide by, slip away, go by, slide by, go along]

Synonyms of 'slip away'

From: Moby Thesaurus

bow out,
creep out of,
depart,
disappear,
duck out,
escape,
exit,
find a loophole,
go on furlough,
go on leave,
leave the scene,
mooch off,
shuffle out of,
skulk away,
slide off,
slide out of,
slink off,
slip off,
slip out,
slip out of,
slip through,
slither off,
sneak off,
sneak out,
sneak out of,
sneak through,
squirm out of,
steal away,
take leave,
worm out of,
wriggle out of