お先に

Meanings

1. Adverb

   before; previouslyPolite
2. aheadPolite

3. Expression

   pardon me for leaving (before you)AbbreviationPolite

• どうぞ、お先さきに！

  Go ahead.

• 「お先さきに失礼しつれいしま～す」「お、なんだ、また定時上ていじあがりかよ」

  "Bye, see you tomorrow." "Oh, what's this? Leaving on the dot again?"