wha-pop 

wha-pop is short for whats poppin in the same way that wha-gwan is short for whats gwannin. i hear it now in t-dot mainly used by teenaged girls here

yo wha-pop breddrin

wha-pop by MrTurtle October 7, 2007

whapop 

Short form for what’s popping (what’s heppening)

Jerome: yo you reaching tonight fam?
Marcus: why, whapop tonight?

Jerome: We getting lit at the club my g
Marcus: I’m down dawg

whapop by akeleven December 1, 2018