An adjective meaning buttery smooth, suave, or full of butter. Has a positive connotation.
Evan wasn’t very buttertastic when he broke up with Kaitlyn over text.
by Rachel Sadowsky January 17, 2019
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adj. having copious amounts of peanut butter to the point where milk is absolutely necessary.

Contraction of Peanut Butter and Fantastic, used primarily in modern stoner speech
Man, this sandwich is gonna be peanut buttertastic! Hand me that milk, bro.
by Skippy Jif Reeses December 2, 2008
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