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.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
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.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.