A word originating in Western MoCo (MD). Refers to when your
texting someone, and they take a ridiculously
long amount of time to respond.
"Mo, I txted you yesterday but you still havent responded. why you gappin on a man like that"
"Man I txted
Jasmin like 7 hours ago and I shes sent me shit.
Girls gappin on a
brotha"