(adjective) The term used for when you're dapping up your bois and grillz. It is the present participle form of "Choo", which is what you say when you dap up your homies/brothers.
Brother 1: "Yo my boi what's good witchu!"
Brother 2: "Ayo what's good witchu brother!"
Brother 1 and Brother 2: *daps each other* "Chooooooooooooooooo!"
Brother 3: "You two really do love Chooing don't you!"
And dying in yo' bed many years from now, would ya be willing ta trade all da days from dis here day ta dat fo' one chance, just one chance, ta come back here as young men an' tell our enemies dat dey may take our lives but dey will never take our freedom ... YUB NUB!