Usually in regards to recreational drugs.
A discreet and effective way of taking them.
"When it comes to taking drugs it's all about shelving"
"He passed out early so we shelved him a gurner to get him keen again."
"Urrrrgh, I definitly shelved too much MXE last night"
The shelving action references the putting of drugs in ones anus. It is performed by holding the palm of your hand upright, with fingers elongated and violently thrusting your arms back and forth.
Contrary to popular thought the shelf is actually a sign of adoration for a band, and its use has subsequently spread across Australia, and across genres.
"Shelve it!" He yelled...
"Whats that?" replied a fellow metal head.
"It shelving!" Chris said enthusiastically.
Soon everyone was shelving along to the bands.
The guitarist spurred on by the crowds response ripped out an amazing shred solo...
2. When a pregnant woman has to rest her stomach on a table
Denise: Why's that Tom?
Tom: Because Sheryl gets shelfed by her fat ass husband
more than a used book at a bookstore.
Example 2. Husband: Hey honey, do you need to stop and rest for a bit?
Pregnant wife: Yeah let me shelf on this picnic table really quick.
(variations include: shelf , shelved, shelving)