Refers to someone who looks like one of your friends, but if they were 30 years older and had completely let themselves go.
Much like a version of Your team for doppelgangers, when you spot someone that looks like a fatter, hairier, and/or older version of your friend, you can then say you saw their "Sloppelgänger".
Dude 1: Yo Mike, totally saw your Sloppelgänger today on the subway. I'm pretty sure he was homeless...but it was like SAME FACE.
When a girl's ass is so flat that it looks as if to be a continuation from her back, straight to her thighs. When the back pockets of her jeans are touching. A.K.A. completely lacking booty.
Damn dude, that girl got a Sloope Duke. Her as is so flat, when she lay's on a table, her entire backside touches.
Where is her ass? Its GONE!!
A shit that comes out so smoothly it hits the water without a splash. The pleasure does not end there. Said turd slides around the u-bend with such grace it hardly leaves any need to flush.
Just been for a man-dump. It was a slooper so slipped out nicely with no mess.....