Green’s Dictionary of Slang

beat-ass adj.

(US)

1. excellent, outstanding [SE beat + ass n. (4)].

Jimmie’s Reviews 🌐 This album should hail as one of metal’s greatest accomplishments. All kinds of polyrhythms, all kinds of beat ass parts.

2. second-rate [beat adj. (4) + -ass sfx].

www.americanjackass.net 🌐 There are some bomb ass chics on there, but unfortunatley [sic] you have your beat ass ones too.