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1.
a person (usually female) who sleeps over after a one night stand and walks home in the morning (frequent term on college campuses in dorms and frats)
Did the shacker leave yet?
by lisagirl April 07, 2003
 
2.
someone who sleeps over at random people's places after a night of drinking
setting: morning
did you hook up with that girl last night?
naw, she's just a shacker.
by txstateperson September 04, 2006
 
3.
Abbreviation for "Shack Her." It is the act of having sex with a female in a mythical location called "The Shack."
See "The Shack."
Keith: "What should I do? My parents are home and I have no where to fuck this chick!"

J.R.: "Take her to The Shack and Shack 'Er."
by The Last Shot Caller November 28, 2007
 
4.
Joy of Satan Ministries (JOS) pronunciation for the word chakra.
Father Satan has a green ooga with little pink shackers.
by Satanic Jesus March 21, 2006
 
5.
A non-knowledgable Radioshack employee, or any electronics salesperson who does not know what they are talking about. They like to upsell and dont have a comprehensive knowledge of electronic components
That sales guy was such a Shacker, he didn't even know what an HDMI cable was.
by Josh from the 'Shack August 05, 2007
 
6.
One who shits and jacks off simultaneously.
"That gay shacker deserves it"
by DOUG October 10, 2003