Hi there, I've seen "it's just not on" before and learned it meant "it's just not acceptable." Still, after reading it again in David Lodge's book Deaf Sentence, I thought I'd look it up again to see if it refers to particular situations. Q1. Does it? In the book, Desmond tells a young girl who would like him to supervise her PhD thesis that "it would be incredibly insulting to Professor Butterworth if I were hauled out of retirement to take over one of his research students. He would never agree to it. And the University would never wear it. It's just not on, I'm afraid." I found this online: http://www.bbcamerica.com/anglophenia/2012/02/frasers-phrases-its-just-not-on/ They say, So, to clarify matters, the phrase it’s not on, or it’s just not on simply means it’s not acceptable. It’s a phrase that comes from the more well-to-do end of British society – upper middle class and above – and is synonymous with other posh expressions of outrage such as it’s just not cricket and well, of all the nerve! -- Then I looked up "it's not cricket" and found that "the phrase it's just not cricket is an old-fashioned British English expression used to describe situations which are unfair or socially unacceptable" Q2. Is there any difference in usage between the two phrases? Q3. Also, is "it's just not cricket" used less than "it's just not on"? Thank you!