Sausy ass nigga describes a person who thinks he is mad cool but in truth is gettin to gully.
To obtain sausyness, a person in general is must show acts of thinking that what he or she is doing is fresh, stylin, trill, and / or on top of their game, but in reality is getting nigg'd by themselves.
A mass produced brownie that claims to be "thick as a nigga" typically made with 60% cacao, the brownies are typically very thick and tasty. Their ad campaign, makes typical 'nigger jokes' such as "thick as a nigga...and half as stupid".
Dude, I ate some thick ass nigga brownies today, they were awesome!