What does the word sour mean?

[Anonymous]

I know that lemon has a sour, acidic taste, but what do we mean, when we say a person is sour?
A dude called me that, because I turned him down for sexting

[slatyb]

Basically it means misanthropic. Turning someone down does not make you sour. He's an ass.

[jshm2]

Means you are an old fashioned spoil sport

[Asker]

Thank you
But I am not like that at all

[UniquelyBasic]

You are angry and are resentful