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Synonyms

bob up

Idioms  
  1. Appear suddenly or unexpectedly. For example, I didn't know anyone in the group until Harry bobbed up. This term uses the verb bob in the sense of “to bounce,” a usage dating from Chaucer's day. [Late 1800s]


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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“That’s the reason why we’ve seen prices basically bob up and down.”

From The Wall Street Journal Feb. 27, 2026

The boys packed together at the front of the field and started to bob up and down together.

From Washington Post Dec. 11, 2022

Their heads and necks will bob up and down, more closely resembling lances drawn and thrust in a medieval battle than silly birds comically bumbling around.

From Salon Nov. 25, 2022

He wanted Gormley to be “long and low,” adjusting his walk to a nice stride and having his head bob up and down to get a rhythm going.

From Los Angeles Times May 3, 2017

I watch her flashlight beam bob up and down with her footsteps.

From "Allegiant" by Veronica Roth

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