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A term used to describe the poor state of one's penis after engaging in acts of sex with a less-than-desirable partner. The prefix 'slosh' could indicate that the penis is infected with an STI or in mangy condition as a result of the recent intercourse.
"Hey Jim, you and your slosh-knob can get the fuck away from me! I know where you've been putting that thing lately!"
by Jo-Ho999 March 04, 2010