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1.
A high-school sub-genera of people who are always in the corner or off to the side playing hackey-sack. They are really into their game trying to keep the hackey-sack going and will not let anyone else play except their fellow sackers. Alot of times they will wear Ear Flap Hats and have renaissance type shoes and backpacks.
Kid,"Hey can play hackey-sack?"
Sacker,"No get out of here!"
Kid,"Stupid sacker."
by sacker hater February 13, 2009
 
2.
A person who enjoys 'brown-nosing' or sucking up to others. Originally derived from a mispronunciation of the word 'sucking' by Lahori prostitutes. Can also be used as a verb - sacking/
Uff dude you are such a sacker its no wonder your lips are shaped like Azhar Mahmood's
by karachikhatmal July 13, 2011
 
3.
One that partakes in the act of sacking.
Sacked like a sacker. Call up Mr. Brady. Tell him to leave his hair to the guy who sings Baby.
by WallabeeKid October 18, 2010
 
4.
Someone who 'believes' they can get any girl in the sack, however in reality have no chance in hell.
Look at Anthony.. He thinks he is such a sacker, he has no clue!
by Anthony White January 14, 2004