The act of placing one's scrotum on the forehead or face of a passed-out/sleeping party go-er; often for photographic purposes. Very similar to a teabag but much safer (if you fear a teabag victim might bite).
My buddy passed out after only six beers so we all gave him a sleeping bag.
by matt68000 June 22, 2004
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This is an example of squaring two consecutive, identical words:

Sleeping Bag² meaning a sleeping bag bag.

ie, the bag a sleeping bag is stored in.

When spoken it is standard to say 'squared' rather than 'to the power of 2' or the traditional long form 'sleeping bag bag'.

Putting such words to a power is a handy method in short hand.
'Eugh, someone has spilt lager all over my Sleeping Bag²'
by mikethemilf March 29, 2009
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The act of a man strechting his scrotum out flat and wrapping his entire package in it
When I looked back at him he was giving me the sleeping bag
by Og_mudbone April 3, 2009
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Sleeping Bagging, sometimes colloquially referred to as the Reverse Birth, is a proposed sexual move involving two adult humans, one of which must be female, whereby the female's vaginal canal and uterus are accessed in a manner analogous to entering a sleeping bag.

The technique was first described in early 2006; by 2009 the appearance of Octomom raised hopes that a female possessing sufficient vaginal elasticity might exist. This prompted an investigation into its feasibility; however, scientists have since concluded that, if it were implemented, Sleeping Bagging would have a 100% mortality rate for the female. Experts also believe that it would likely result in severe compressive injuries, hypoxia, and psychological trauma for the other partner. For these reasons, Sleeping Bagging remains a purely theoretical conjecture.
Sleeping Bagging reminds me of tucking into a warm, safe place.
by Reverse Birther July 19, 2011
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At the end of masturbating instead of ejaculating after orgasm into things such as a tissue, stray shirt, floor or stomach you stretch ones foreskin out and ejaculate into the foreskin like a sleeping bag then walk it to the toilet for drop dump.
by J busy October 26, 2014
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"I want that Sleeping Bag bro... making money while i'm sleep. Ya feel me?"

"Buy me a couple houses, get me a few tenants... then boom, I got that Sleeping Bag"
by Mkhai Sphinx June 22, 2019
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A less explicit way of saying condoms.
"Hey, Tina, Can I borrow a couple sleeping bags? Its gonna be a good night ;)"
by MollyConnolly November 14, 2009
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