slip out of

US /slɪp aʊt əv/
UK /slɪp aʊt əv/
"slip out of" picture
1.

to escape or leave a place or situation secretly or unnoticed

:
He managed to slip out of the meeting without anyone noticing.
The cat tried to slip out of the open door.
2.

to be said or revealed unintentionally

:
The secret almost slipped out of his mouth.
A small groan slipped out of her as she stood up.