To hide or smuggle items in ones anus
Goodman figured keistering the dildo would be just the trick to avoid detection by store security
von KC Is A Knob Gobbler 21. April 2009
1 more definition
To inject drugs up your or someone else's rectum. Also known as a booty bump. See crystal meth.
Adam came down with a nasty sore in his ass from keistering too much meth all weekend.
von sonomachris 18. September 2006