i-adjective
unpleasant; creepy; off-putting
Describes a person, behavior, or atmosphere that gives a bad impression, feels uncomfortable, or seems disagreeable. Often used for someone's attitude or vibe.
あの店員、感じ悪いね。
That shop assistant is unpleasant, isn't he?
彼の言い方が感じ悪かった。
The way he said it was off-putting.
Compound of 感じ (feeling, impression) and 悪い (bad). The exact historical derivation is uncertain, but it follows a common pattern of noun + adjective compounds in Japanese.