horse around

horse around idiom
Indulge in frivolous activity or play. For example, The boys were horsing around all afternoon. This term presumably alludes to horseplay, which has meant “rough or boisterous play” since the late 1500s. [First half of 1900s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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