Shirabe
卑怯
Common I-adj Noun
English jmdict
1
adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) cowardly;craven
2
adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) unfair;mean;sneaky;dirty;dastardly
It's mean of you to talk that way.