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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*
by Rawraw420 September 27, 2007
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A person who knocks jacks or "knocks them up".

It can also be a gruop of people who are extremely obnoxious, so obnoxious these people talk a language of their own, similar to some other languages but it sounds like complete giberish.
Wow, dude that guy is talking jackknocker again, fuck i hate that jackknocker.
by I. M. Stoned-as-Hell June 18, 2010
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