A man or woman who would like to get a boyfriend or girlfriend, but are to lazy to do anything about it. (The noun being "Slunking", the ACTION of being too lazy to get a girl/boyfriend.)
Steve: hey man, when was the last time Fred had a girlfriend?
Bob: I have no idea, he's such a slunker, it's been ages!
Bob: I have no idea, he's such a slunker, it's been ages!
by Jesus Was Emo. August 22, 2007
Get the Slunkermug. A euphemism for masturbating.
by wtflolz October 11, 2015
Get the Slunker Slankingmug. 
by SavvySipper April 24, 2025
Get the Slunkermug.