Jacknocker 

An insult for something stupid.
Or someone stupid.

Stop being such a jacknocker.

Jacknocker by forever brittany August 6, 2010

jackwacker 

A person who sucks at life. They are incapable of performing basic and simple daily tasks (with the exception of masturbation).

You have your left turn signal on and are clearly trying to merge into the left lane; instead of slowing down to allow you to change lanes, the Jackwacker behind you speeds up to block your access. This guy is a complete Jackwacker; he sucks at life.

jackwacker by plokmijnuhbygv July 19, 2011

Jackfucker

Someone who involitarily acts like an asswipe

You fuckin' Jackfucker!!!
- see asswipe

Jackfucker by Amy December 12, 2003

jackknocker

An individual whos name when said outloud your first instinct is to shake your head in exasperation and sigh.

Statement: That guy is a jackknocker.
Question : What is a jackknocker?
Answer : *sigh*

jackknocker by Rawraw420 October 11, 2007

Jackzacker 

A homosexual activity, which involves an individual "Jacking off" a minimum of 10 other gentlemen in a single night/party/event. Only once all 10 men have ejaculated can the act be called a Jackzacker.

Brad: Last night at the club i Jacked off 15 blokes
Shane: thats a great Jackzacker-ing
Brad: yep once I hit 12 my right wrist got sore so I had to use left
Shane: is that a record?
Brad: yep my jackzacker record was 13 not its 15!

Jackzacker by The park 9 pussy pounder January 12, 2017

jackfuckery

The possession of a severe mental defect resulting from the consumption of paint flakes, paste, or some other cause of reduced mental faculties. Any acts committed by such an individual are defined as such.

I've had it with the jackfuckery here.

Your jackfuckery will no longer be tolerated

jackfuckery by Batts_Smash June 1, 2011

jacknackel 

A friendly term used for someone who has screwed up.

Way to go, jacknackel.

jacknackel by CB April 11, 2005