i-adjective
stupid-looking; silly; foolish
Describes something or someone that seems stupid or silly in a casual, often lighthearted way. The suffix っぽい adds a sense of 'appearing to be' or 'having a tendency to be'.
その帽子、ちょっとばかっぽいよ。
That hat looks a bit silly.
彼
His excuses always sound stupid.