It just means awesome. Because asses are awesome. Similar to words "sick" or "wicked". And VERY similar to the expression "that's tits".
The lighting in the new Call of Duty is asstastic
by dooderonomy November 18, 2013
Get the asstastic mug.
That ass looks mighty asstastic today.
I woke up this morning and thought to myself boy my ass is looking pretty asstastic..
The one thing I can tell you about that girl is she be looking asstastic.
I'm going to smash that because of that me looking ass-tastic.
I want to smash that ass-tastic ass.
by Britney Hamilton December 8, 2021
Get the AssTastic mug.
When a girl's ass is the most defining feature, often times all other features being ugly. It is generally the same idea as being a butter face, except for the ass,
Man, Sadie isn't too hot, but she sure is asstastic.
by Hyderabod April 20, 2016
Get the Asstastic mug.
butt deodorant coming in a triangle roll on tube especially for your butt to prevent swamp ass from sticking around. one application a day takes the swamp ass away
aint no body dope as me im just so asstastic and swamp ass free
by Ana.L November 13, 2014
Get the asstastic mug.