Everyone knows whales have huge penises, they even make the sea salty with all their semen. A slippery sleeping bag is the act of climbing into a whale's penis, cause you'd totally fit.
"So I saw that Bear Grylls where he slept in a dead camel, apparently the desert is cold at night. Weird I know. So anyway, I figured it might work the same with a whale's penis, but I was all wet so I was still cold.

Still though, I'm gonna copyright it, so Bear Grylls can't talk about the Slippery Sleeping Bag without paying out.
by amnsiac May 15, 2009
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When your stick both feet in a girls vagina and pull up on it like a small sleeping bag around your feet.
“Dude I did Nïchan’s sleeping bag on her last night, she loved it”

“Bro that’s so awesome!”
by Nichan March 12, 2019
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When a woman has a Uterine prolapse (uterus falls out of the vagina), but she's white trash and keeps shoving it back up inside herself with hopes of popping out another kid.
"Damnit Cathy, you sneezed and your puss popped out and it looks like a wet sleeping bag!"

"Damnit Karen, put your wet sleeping bag away, the floors wet again... grab a mop!"

"While golfing yesterday, Tina left a wet sleeping bag in the porta poty."
by 39TWA07 September 26, 2020
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A person with an uncircumcised penis who ties the foreskin off at the tip and then jerks off, usually while thinking of ghost stories around a campfire.
chasturboop
I went camping in the mountains over the weekend by myself so I could give myself a creamy sleeping bag in peace.
by Gino Felino April 13, 2011
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Refers to an uncircumsised male penis, since it resembles an unrolled sleeping bag.
"Have you seen that Bob's got the sleeping bag syndrome? What a turn-off!"
by Erika Butler June 11, 2008
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When one cannot achieve sleep due to the Artic-like temperatures, and is forced to ask a Canadian friend to spoon them for body heat. As you may know, Canadians are completely unaffected by the cold.
Guy 1: "Dude it's freezing, can you give me a Canadian Sleeping Bag?"

Canadian: "No problem, eh"
by JessOdair August 29, 2011
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Sitting between two guys in FUBU jackets on the subway. (Saturday Night Live, 5/7/11)
I got a nice nap on my way home because Jerome and Tyrone made a nice subway sleeping bag for me.
by funkypeepz May 8, 2011
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