sneak up to

sneak up to (someone or something)

To creep up to or alongside someone or something in a secretive or inconspicuous manner so as not to be seen or noticed. I snuck up to the window to see what was going on inside the building. She snuck up to the man and slipped a note into his bag.
See also: sneak, up
Farlex Dictionary of Idioms.

sneak up to someone or something

to move close to someone or something quietly and in secret. I sneaked up to Don and scared him to death. Don sneaked up to the punch bowl and helped himself before the party began.
See also: sneak, up
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • sneak up to (someone or something)
  • slip past (someone or something)
  • sneak in
  • sneak in(to some place)
  • slip across
  • slide out of
  • slide out of (something or some place)
  • slide out
  • sneak away
  • sneak away (from some place)