cheesy

安っぽい、質が悪い、趣味が悪い、ダサい、頑張り（やり）過ぎ、わざとらしい、うさんくさい、つまらない、陳腐な

e.g.

She gave me a cheesy grin.
The T-shirt is a kind of cheesy.

Reference source

https://ez-eigo.com/blog/wp3/cheesy/#cheesy