romp

Short definition from Wiktionary

Verb

1. 1
   To play about roughly, energetically or boisterously.
2. 2
   (Often used with down) To press forcefully, to encourage vehemently, to oppress.
3. 3
   To win easily.
4. 4
   To move with little effort relatively quickly.
5. 5
   To engage in playful or illicit sex.

Noun

1. 1
   Someone who romps; especially, a girl or young woman who indulges in boisterous play; a tomboy.
2. 2
   A period of boisterous play, a frolic; now especially, a bout of sexual activity, especially when illicit.
3. 3
   An enjoyable, fast-paced but essentially inconsequential film, play, or other piece of entertainment.
4. 4
   A decisive victory; a game, match etc. which is won easily.