A conjunction of "cock" and "sasquatch", used to pejoratively describe someone who is being a spectacularly massive dick.
"That cocksquatch just cut me off! Now I must kill him and eat his skin!"
"If you don't desist in these acts of cocksquatchery, I shall be forced to kill you and eat your skin."
"Did you hear about this Hitler guy? Apparently, he was a total cocksquatch. I wish someone had killed him and eaten his skin."