forbidden fruit

US /fɚˌbɪd.ən ˈfruːt/
UK /fɚˌbɪd.ən ˈfruːt/
"forbidden fruit" picture
1.

something desired or pleasurable that is not allowed or is illicit

:
•
The secret affair was their forbidden fruit.
•
For some, staying up late feels like a kind of forbidden fruit.
:
illicit pleasuretaboo desireforbidden pleasure
:
forbiddenfruitpassion fruitdragon fruitfruit saladdried fruitfruit bat