noun
1 - The union of a human ass and a toilet, which upon flatulence produces a low-pitched sound (bass) often heard in the presents of a random jackass having a telephone conversation whilst shitting.
Over phone: What was that sound? Was it an Asswoofer? Dude are you talking to me on the shitter, in a public restroom? You ass!
An encounter with an individual suffering from swamp-ass causing great and often sudden harm or embarrassment to the individual and /or situation; a dis-ass-ter.
I was 69ing with this chick when I realized her ass crack smelled like dingle-berry soup. What a swamp-asstrophe!