Slip away
Lose an opportunity or the chance of winning, succeeding, etc
Slip by
Pass quickly (time)
Slip down
Be enjoyable to drink or eat
Slip in
Try to include something discreetly when speaking
Slip into
Put clothes on quickly
Slip off
Leave a place discreetly
Slip off to
Go somewhere discreetly
Slip on
Put clothes on quickly
Slip out
Leave discreetly
Slip through
Escape notice and be approved
Slip up
Make an error