creep up on

中級 (B1) neutral

To quietly move close to someone before they notice you, or for something to happen slowly and surprise you.

"He crept up on his sister and shouted 'boo' to make her jump."

関連フレーズ

creep in creep on creep out creep up

"up on" を含むフレーズ

beat up on check up on follow up on gang up on hook up on load up on pick up on polish up on
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