Humanity is all of us homo sapiens or people. A mass is a large number. "Mass of humanity" is just a cliche way of saying a lot of people.
The phrase "sins against humanity" has become almost a cliche when describing events like the holocaust, environmental destruction, war and the like. The closest Biblical reference I could find was 1 Samuel 2:25. It seems to reference that God will judge you for your sins. To me, it is saying you can give yourself to God and repent.
The plural of cliche is cliches.
It's a geometry term and a play on words. A cliche parrot name is "Polly", as in "Polly, want a cracker?" or like the cliche, Fido, name for a dog, or the cliche company name "Acme". Polly (parrot) gon (gone=dead)
Lucien Cliche was born in 1916.
Lucien Cliche died in 2005.
Vital Cliche died in 1976.
Vital Cliche was born in 1890.
Karen Cliche is 5' 9".
Extreme changes of fortune.Too much of something or not enough of something
It means cliche, so old that it's not humorous any longer.
A tidbit of something valuable. (eg) a nugget of wisdom
Same as in English, something that's overdone to the point of predictability and cheesiness.