run up on
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English[edit]
Etymology[edit]
Verb[edit]
run up on (third-person singular simple present runs up on, present participle running up on, simple past ran up on, past participle run up on)
- (transitive) To approach with speed or forceful intensity
- Hey, don't run up on me like that while my back's turned...I might accidentally deck you.
- (transitive) To confront with hostility