Top definition
A descriptive word for someone ass.
Ussually a good thing - meaning one has a 'mountable' ass
Jane says 'Damn, look at the ass on him. VERY mountainous'

Sara says 'Yeah, for sure, bet that's what his boyfriend thinks too.'
by Sofaqueen March 10, 2008
Get the mug
Get a Mountainous mug for your grandma Helena.
Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
Get the mug
Get a jabbed mug for your guy Paul.