from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Rowdy or rough play.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Rough or rowdy play that can often result in unintentional physical harm.
- v. To engage in horseplay.
from the GNU version of the Collaborative International Dictionary of English
- n. Rude, boisterous play.
from The Century Dictionary and Cyclopedia
- n. Coarse or rude play.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. rowdy or boisterous play
A compound of horse + play, possibly from observation of boisterous horses playing. (Wiktionary)