Definitions by RSLancaster

Smith 

To scratch or rub the pubic or anal areas with one's finger to obtain the scent for self analysis, also called the 'scratch and sniff.' It is used to determine the cleanliness of the area.

"Yo dude! did Sam just...?"
"Yep, he smithed his asshole... again"

Smith by RSLancaster November 17, 2009