A boot or shoe with water trapped inside.
slish slosh slish slosh... garggle... slurrrrrrp

guy: "fuckin slosher..."
by thelastmanonearth July 15, 2006
A man who rubs his penis around in seman on some ones anus
"I had my ass sloshed by a slosher last night"
by Dave dude January 09, 2006

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