Shelfing is an activity where people try to fit themselves inside a closet. It is a prerequisite for proper shelfing that the closet is not larger than your body volume plus 0,5 m3.
I saw two gals at the museum who had lots of fun shelfing in an antique closet, with the curator planking on the top of it.
by Saturninus October 31, 2011
A common photography pose in which a person places their hand beneath their chin, forming a sort of shelf for their head to rest on, in order to better frame their face. When such a pose is used for a selfie, the resulting image is called a "shelfie"
by flyingpenguin December 14, 2014