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1.
Someone who doesnt smoke on a regular basis but they will steal, or scrounge, one of your cigarettes due to their 'social' or 'casual' smoking habits. You are normally liable to be scrounged from after these 'casual' smokers have had a beer or two.
Bob: Hey, You have a cigarette for me?
Bill: FUCK OFF! THESE ARE MINE YOU SCROUNGER!
by Sweet Lu July 10, 2006
 
2.
Someone/something who is dirty or a great name for your furry friend!
"Scrounger drug his butt across the carpet today!"
"Geez, that guys such a scrounger!"
by scrounger hoes October 17, 2009