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1.
Someone who commits to hangout with his friends only to duck out on them and ditch them for something way less cool.
Eddie: Hey do you want to hang out Wednesday?

Chris: Sure, I will definitely be there Pri!

(Two Days Later)

Chris: Yo, I need to duck, I have to watch Obama's speech

Eddie: Man, you are such a ducker!
by Primary April 20, 2009
 
2.
someone that is antisocial or otherwise a pussy.
"Jim is a fuckin' ducker. He's always suckin' himself off with his gleivinfriends
by Jake January 06, 2005
 
3.
A person that repeatidly goes AFK in the middle of an instant message conversation without letting you know they are away from the computer.
"That vincent is a right ducker, its a nightmare to get a normal conversation out of him."
by RevMB April 22, 2008
 
4.
n. Person who likes "Duck Dynasty", an inexplicibly popular TV show.

..................................................................................................................................................................
I hear your wife watches silly shows.

Yup. That little ducker is a gem all right.
by gnostic 1 June 01, 2013
 
5.
A rather large stone used as a form of primative weaponary. So named as when thrown it requires one to crouch down or as the term goes 'to duck.'

'Ducking' was primarily considered the best form of defence against such attack until, as a species, we became more intelligent and in fact 'running' is now considered much more effective. This may be for two reasons; 1.) Attackers were becoming more wise to such 'ducking' and therefore proceeded to throw the 'ducker at a lower level, causing many injuries to the back of the head and back. 2.) If running is achieved at a credible pace it limits the possibility of secondary or multiple attacks. Whereas with the primary defence, 'ducking' there was almost always potential for secondary or even multiple ensuing attacks, unless with some luck, the attacker runs out of such ammunition. In which case, usually the 'attacker' then becomes 'defendee.'

Thus, my opinion is that the name of this here weaponary be changed in fact to 'a Runner.' Although I admit, it does not have quite the same ring to it, nor would it prevoke the same sense of fear when used as verbal in attack.
E.g. Dave: 'I'm gonna come over there and knock you out.'

Rob (picking up a rather large stone): 'Come on then!'

Marv, friend of Dave: 'Oh shit, he's gunna lob a ducker.'

Dave: 'Fuck it, run!'
by Davo Van Dangerous November 06, 2009
 
6.
replacing the word "fucker" in an email so as it will not be flagged in the email filter at the office
Nate: "Are we still doin lunch today at Hooters?"

Mikey: "for sure, I'll meet you duckers at the bar, it's friday, we can get duckin wasted."

Nate: "Duck yeah"
by mikeyo97 April 29, 2009
 
7.
Someone who is hiding from you, because they are scared
TuMuchSwag is a ducker, he is scared to play me in 2k12
by This Guyyy Joe June 02, 2012