A word invented on the spot by a stoned person to make a point, ie 'Cumberbumbling'. Often prefaced by a pause as the person tries to figure out an actual word to say and fails. Most often paired with words such as 'like', 'shit man' and 'woah'.
"That blunt was so fat I...kisjefugh...fuck."
"Dude, that was such a cumberbumble."