开黑

开黑	kāi hēi	(slang) (online gaming) to team up with friends in a coordinated private group (黑 indicates private, team-only chat)
开	kāi	to open (transitive or intransitive) / (of ships, vehicles, troops etc) to start / to turn on; to put in operation; to operate; to run / to boil / to write out (a prescription, check, invoice etc) / (directional complement) away; off / carat (gold) / abbr. for Kelvin, 开尔文 / abbr. for 开本, book format
黑	Hēi	abbr. for Heilongjiang province 黑龙江
黑	hēi	black / dark / sinister / secret / shady / illegal / to hide (sth) away / to vilify / (loanword) to hack (computing)