A peeping Tom
A man who secretly watches women while they are taking their clothes off or having sex
I always close the curtains in case there are any peeping Toms across the road.
Gaze at your navel (humorous)
To spend too much time thinking about yourself and your own problems
I read his novel, and thought the man's obviously spent far too long gazing at his own navel.
On the blink, not working properly; in need of repair.
My computer is on the blink again.
To disapprove of (something).
My family frowns (up) on smoking and drinking.