Someone who enjoys the fresh but musky smell of a nice ass. In sex, be it with a guy or a girl, they will always love the ass and get their face as close as possible.
Hey, get over here, go down on me and stop being a dirtybutt smeller.
This is an expression. A way of conveying one's affection for someone special. This expression enables someone to get right to the crux of their intentions. A favorite pickup line amongst men in pursuit of a lady. Can be used interchangeably as a means of simply getting someone's attention. Some lucky recipients may be offered a positive, accommodating response by being offered the opportunity to 'snort anal crack'.
A game you play in which you stick your finger up your butt a little bit, then you sneak up on a friend & jab that finger up your friend's nose while you shout "Buttsmell! Buttsmell!"
Your buttsmell will wipe from your finger to your friend's nostril, & the smell cannot be gotten rid of. It has to fade away.
lol I buttsmelled you, & you threw-up from the stink. You'll remember my buttsmell forevernow.