A person who stalks or creeps on people on the Internet to collect information about them.

Can also be used as a verb.

Got the covid-19 vaccine

duh fuck is this shit?

pronounced: duh-fits

D.F.I.T. = Dumpster Fire in Training. (See definition for Dumpster Fire.)

Visual example: If you were to see a teenage girl walking down the street smoking the wrong end of a cigarette, with one flip flop and one fuzzy boot, short-shorts modified to reveal her entire uterus for the world, wearing ridiculously over-sized bedazzled sunglasses, 6 colors of jacked-up make up, a cut-up wife beater top, and evidence of recent substance abuse visible from a distance...

That chick is a total dumpster fire in training!