rumpus room 
noun North American & Australian /NZ
A room for playing games, typically in the basement of a house.The former is an efficient enclosure clad in recycled hardwood, with bedrooms above a rumpus room, services and garage....
- There is a rumpus room and the living area is very spacious and has air-conditioning for your comfort.
- Other ground floor accommodation consists of a bathroom, three bedrooms, two of which will become a library/computer room and a rumpus room when upstairs is complete.
- don't-carish
- don't-carishness
- dontcha
- don'tcha
- don't change horses in midstream
- don't count your chickens before they're hatched
- don't give it another thought
- don't give up the (or your) day job
- don't hold your breath
- don't I know it!
- don't-know
- don't knowist
- don't look a gift horse in the mouth
- don't mention it
- don't (or I wouldn't) bet on it
- don't put all your eggs in one basket
- don't spoil the ship for a ha'p'orth of tar
- don't start (or don't you start)
- don't talk to me about ——
- don't you believe it!
- don't you know
- don't —— me
- donut
- doo
- doobie