A person that is a try hard and useless - a bit of a Karen.
Think of a testicle that has gone through a vasectomy. It’s now a useless spud - nut means balls but also crazy.
That guy is a total Spudnut!
Alright Spudnut.
He has gone Spudnut on them.
Person 1: Dude LOL, that's OFN, maybe you should STFU.
Me: IHALTT