Green’s Dictionary of Slang

unpunctuality.

1997		C. Newland Scholar 156: The Dredd had ushered them into a room which had hitherto been locked, to wait for Kenny who ran on BPT – black people’s time.
2000		Ebonics Primer at www.dolemite.com 🌐 OPT Definition: Oriental People Time. To perform an action quickly. As opposed to Black People Time (slo as molasses, bitch). Example: You bes be gettin mah clip O.P.T, not B.P.T, mothafucka!