Bitcoin and mbtc is only what i use. Learned mbtc while counting the chips in online poker games lol they all talk in mbtc there.
Most of the relevant (non-dice) gambling sites refer to chips/units as mbtc/btm (0.001btc). I will always consider 0.001btc as 1btm because of Dragon's Tale and Seals With Clubs. Btc, btm, and sat/ksat/satoshi are all we need