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(mo'-yak) (long o sound in first syllable)

1. Derogatory name given to a close friend, family member, or coworker as they're doing something incorrectly or unsafely. Spoken directly toward them as a friendly means to belittle them or their actions.

2. A family friendly means to replace cuss words like dumba**, dips***, *ucktard, etc.
To a coworker: "Hey Moyack...be careful, dont hit your head this time."
To a kid: "Clean your room Moyack and then we'll go out for pizza."
To a friend: "Dude, watch this Moyack on the skateboard...he's not gonna make it."
Moyack by itakepwnership October 11, 2009
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mooyacker 

A mooyacker is a fat assed looser that likes to talk alot about nonsense, usually shit that no one else but his stupid ass cares about!
That dumb ass mooyacker broke the chair when he sat in it, but he still kept talkin, even after his fat ass hit the ground!The Juice finally said " Shut the fuck up you stupid mooyacker!!!
mooyacker by Jimmy III July 26, 2006
Related Words
Moyack Mojack Molack Moyock mofacka mohack mooyacker mofacker mofackus Mofacky
A young person who asks to many questions, most of which are stupid
Vince: Man, Brett asked me another fucking question today
BD: Yeah that dude is such a fuckin moyock
Jon: Yeah, we might as well call him Moyock Moyockerson
moyock by Jour-Hadique December 9, 2008

mooyacker 

A mooyacker is a fat assed looser that likes to talk alot about nonsense, usually shit that no one else but his stupid ass cares about!
That dumb ass mooyacker broke the chair when he sat in it, but he still kept talkin, even after his fat ass hit the ground!The Juice finally said " Shut the fuck up you stupid mooyacker!!!
mooyacker by Jimmy III July 26, 2006
Slang term for Icelander, especially a rural one--popular term among US military personnel stationed in Iceland during WWII. Origin unknown.
That Mojack insisted vehemently that his cow was sick because of being sexually assaulted by our soldiers, but after our camp veterinarian diagnosed and treated her for a common bovine ailment, she made a full recovery; then the Mojack gave us some cheese to make amends.
Mojack by hyjyljyj October 27, 2007
When cursing is unacceptable because you're either at church or at a business meeting or among mixed company or you want your underage kids to use a curse word and the verb or noun mother fucker needs to be used you can you mofackle instead.
Confession to Priest: Forgive me father, for i have been a bad mofackle!

In anger: You are on dumb mofackle!

Son: Daddy that mother fucker almost hit us running that red light!

Dad: I know son but please use mofackle instead!

mofacker 

mother fucker, in a polite and lazy manner
You stupid mofacker!!
mofacker by Ram-Dawg April 15, 2003