To club someone over the head with a stiff, blunt object - as a caveman would do - in order to render the person unconscious.
The homeowner grabbed a wooden bat and glunked the unaware intruder.
Glunk refers to the pokemon core of using gligar and skuntank on a single pokemon team.
That guys glunk team totally destroyed me-guy 1
Yeah dude you got glunked-guy 2
A slimy substance that still keeps its shape a bit, I.E Gunk, Grime, Goo, Slime, Sludge, Ect..
Person A: Hey dude, you see all that stuff?
Person B: Yeah, That Glunk.