jacknackel 

A friendly term used for someone who has screwed up.

Way to go, jacknackel.

jacknackel by CB April 11, 2005

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

jacknickulous 

A ridiculous way of saying ridiculous. Used to accentuate the utter ridiculousness of that to which you refer. During the holiday season, this may be replaced by saintnickulous.

The way Grandma Esther butters her saltines is utterly jacknickulous.

jacknickulous by Blessed Hamo April 22, 2005

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

Jacknocker 

An insult for something stupid.
Or someone stupid.

Stop being such a jacknocker.

Jacknocker by forever brittany August 6, 2010