The act of inhaling methane out of one's anus. This is commonly performed during foreplay, but is also a quicker, less potent alternative to the huffing of manufactured jancum.
1. My wife likes to be butt-huffed.
2. I need a quick fix. Drop your pants and let me butt-huff you.
3. That girl's really into butt-huffing. I'm gonna go eat some chili...
by Grandmasterpapasmurf January 17, 2013

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