NONO

Tue, 18 Feb '25

Don't-do

Sat, 14 Sep '24

Bad idea

Thu, 22 Aug '24

Baseball pitcher's feat, informally

Mon, 5 Aug '24

Something forbidden

Fri, 26 Apr '24

Something best avoided

Fri, 19 Jan '24

Leaving a participle dangling in English class, say

Mon, 30 Oct '23

Using ketchup on a steak at a fancy steakhouse, e.g.

Sun, 9 Jul '23

Don't

Tue, 13 Sep '22

Running by the pool, e.g.

Fri, 3 Jun '22

Giving chocolate to the dog, e.g.

Wed, 26 Jan '22

Taboo

Fri, 26 Nov '21

You shouldn't do this

Mon, 11 Oct '21

Forbidden action

Sun, 16 May '21

Ill-advised move

Wed, 30 Dec '20

Taboo