no-no 
noun (plural no-nos) informal
A thing that is not possible or acceptable: perming highlighted hair used to be a definite no-no, but it’s now possible...
- So an office at that end of the building is a definite no-no as the droning hum could drive me mad.
- That sort of event was a definite no-no and he worked hard to prevent such things.
- Wiggling out was a definite no-no since he had already made sure that I had nowhere else to turn to.
Rhymes
- local colorist
- local colour
- local colouring
- local colourist
- local content
- local council
- local councillor
- local councilor
- local derby
- locale
- local education authority
- local election
- local examination
- local exchange
- local exchange carrier
- local government
- Local Government Board
- Local Group
- local hero
- local historian
- local history
- plumage
- plumaged
- plumagery
- plumashe