1) Abbreviation for "On God"
meaning to heavily agree to
something, and show that agreement by mentioning the life of God.
2) Misspelling of "
OMG" which is an abbreviation for Oh My God/Gosh/etc.
1)
P1: "My favorite part about the
party was how hyper the DJ was"
P2: "ONG
DUDE"
2)
P1: "ONG I JUST GOT TOLD VERY BAD NEWS ABOUT MY
PARENTS"
P2: "You misspelled OMG, dumbass."
P1: "Why does that matter...?"