creep up

creep up

1. To approach someone or something slowly and often stealthily. I crept up behind my brother and startled him.
2. To encroach (upon one or something) gradually over time. It wasn't until I sat down that I realized how much exhaustion had crept up on me. The weeds have been really creeping up on the edge of the yard over the last few years.
See also: creep, up
Farlex Dictionary of Idioms.

creep up

[for darkness] to move gradually and slowly [toward someone or something]. Dusk crept up and swallowed us in darkness.
See also: creep, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • creep up on
  • creep up on (someone or something)
  • creep under
  • creep under (something)
  • creep out
  • creep along
  • creep along (something)
  • creep away
  • creep over
  • creep over (someone or something)