look up any word, like lemonparty:
 
1.
Noun. Singular. US English colloquialism. A comfortable place in which to sit.
My favorite butthaven is this sofa.

This car seat is so uncomfortable, it's no butthaven.
by MustafaMustafa67 January 06, 2011
 
2.
What you call somebody who lives up there own ass.
"Woah I look good"

"Dude your such a butt haven"
by HotBitch January 02, 2006