i-adjective
dingy; slightly dirty; grubby
Describes something that looks a bit dirty, shabby, or unkempt, often with a nuance of mild disgust.
彼はいつも小汚いジャケットを着ている。
He always wears a dingy jacket.
その店は小汚いけど、ラーメンが美味しい。
That shop is a bit grubby, but the ramen is delicious.
i-adjective
Used for a person's character or behavior that seems somewhat mean, sneaky, or morally shabby. Less common than the physical dirtiness sense.
あの男のやり方は小汚い。
That guy's methods are underhanded.