The act of meandering or wandering around in an aimless manner that makes very little sense to everyone, including yourself. Derived from the movie Forrest Gump.
George: "Dude, where were you?"
Francis: "I went out over the bridge, then spied some filthy n'wah. After that I trekked further past Red Mountain and narrowly avoided an angry spriggan. After gumping around a bit more, I returned to my home."
Gumping refers to the process of being Donald Drumpf, whereby one nigs and gumps in mockery of human behavior; the process of blaming everything on anyone but oneself, even when one is blatantly guilty.
Ty was gumping when he tried to blame his erectile dysfunction on Billary Clinton AND Mexicans.