A person who will often partake in the act of sniffing another's anus or sphinctal region. No one is a true butt-sniff unless they truly enjoy the act off butt-sniffage.
Person 1 bends over
Butt-sniff sniffs the rear of person 1 with a satisfied look on their face
Person 2: God you're such a Butt-Sniff
Butt-sniff sniffs the rear of person 1 with a satisfied look on their face
Person 2: God you're such a Butt-Sniff
by n0ddy96 September 2, 2010
 Get the Butt-Sniffmug.
Get the Butt-Sniffmug. by Jimmy Duncan  March 5, 2021
 Get the Brazilian Butt Sniffmug.
Get the Brazilian Butt Sniffmug. by cowpie52 February 24, 2009
 Get the butt-sniff-aliciousmug.
Get the butt-sniff-aliciousmug.