A noun: when chia pet soil is used for lubrication during sex. specifically in the anus.
"Oh dude this one girl im with is totally into getting a Bum Gardner its insane"
by iminapillowcase August 17, 2006
Derived from an older German last name, "Baumgartner", meaning gardener of tree groves, the altered name "Bumgardner" is a variation that is more similarly meaning that of a sexually active person who trains and sells prostitutes similar to gardening as a pimp.
Dylan Bumgardner sells some hot ass ho's.
by gubgub1234 February 21, 2009