Usually assumes the form of an insecure wannabe badass with a chip on the shoulder the size of a buick, and an IQ number less than their shoe size. Your average knellerhead can usually be found trolling internet bodybuilding forums under multiple psuedonyms... but can also be described as an overzealous, pompous, or vexatious asshole that most people wish were killed with a Mortal Kombat fatality.
The knellerheads are at it again - when will they learn that we can see their IP addresses, they're not in China, and they've got fivescreen names?
A complete and total asshole. Beyond the realm of bastard or shithead; a knellerhead is a title given to those not only showing exceptional skill in being a total prick, but taking above-average enjoyment in their dirty deed. To appropriatly call someone a "knellerhead" they need to be at least an asshole, but have at least a hint of malice in their actions.
someone who tends to masturbate mostly from the knees, usually on Linoleum or hard wood floors. this subject tends to have a sexual abuse history, stemming from an uncle getting knuckle deep into thier 9 yr old cornhole.
Similar to a brown noser, where the nose of the person is up the superiors butt a Red Kneeler has sore knees from Felating the superiors to gain advancement.
Isabelle is completely incompetent, but because she's a red kneeler she gains advancement.