A Fungler is a person who masturbates using mushrooms. This can including hollowing out the stem of one of the bigger types of mushrooms and thrusting one's cock in it, or various other methods.
Krunk is an adjective for things that are like super chronic or have been going on for a very long time.
There are two ways one can define Krunk Fungler.
1. A Chronic Fungler, eg. one who has masturbated with mushrooms for years and years.
2. A Fungler (mushroom fucker) who often edges.
These definitions are not mutually exclusive of course
Philbert: Hey is Ethan coming to Longhorn Steakhouse with us tonight?
Johnny "Bilge Suit" Blenderman: Nah man you know that motherfucker is a Krunk Fungler, he's been locked in his room with a pack of portobellos and Toadette r34 for weeks now.
A Fungler person who is addicted to shrooms and masturbates to Toad from Mario.
Krunk is an adjective for purple and swollen.
Thus, a Krunk Fungler is a person who edges to toad until their cock turns purple
Jefferson: Hey is Ethan joining us at the bar tonight?
Johnny "Bilge Chute" Esgarcot: Nah, you know that motherfucker is a krunk fungler, bet he's moaning and jerking to fucking toad preforming autofellatio