i-adjective
Slang adjective, possibly derived from やばい. Used to describe a situation, person, or thing that feels unsafe or shady.
あの路地は夜になるとシャバいから、通らないほうがいいよ。
That alley gets sketchy at night, so you'd better not go through it.
i-adjective
Slang adjective, possibly from しょぼい. Expresses disappointment or that something is underwhelming, dull, or not worth it.
昨日の映画、マジでシャバかった。金返してほしい。
Yesterday's movie was seriously lame. I want my money back.