Pre-game dabs and dabs by fans do not qualify. Dabs by refs do qualify but that has not happened yet (as far as I know)

Honorable mentions:
Glenn Robinson III dab dunk in dunk contest (2016)
Rajon Rondo dabs after Cousins dunks on Lopez (2015)
Jaylen Brown dabs in response to Yabusele 3 vs Nets (2018)
Steph Curry dunk and a dab (2017)
Timofey Mozgov dunk and a dab (2016)
Paul George dabs a second time vs Pistons (2015)