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2.
Something you say when someone pretends not to be jealous.
A boy fancied a girl,but another boy took her.He pretended not to care,but his friends said 'sour grapes'.
by SomeoneNew May 15, 2011
 
8.
When a male doesnt bathe for a couple of weeks and then makes his old lady suck on his testicles.
She likes the taste of my Sour Grapes.
by Jon Smizzle May 26, 2006
 
9.
an unfortunate circumstance, or when something doesn't go your way. use it instead of saying "that's too bad" or "that sucks"
oh no you missed the bus? that's sour grapes for you, man

you can't come to the party? that's Sour Grapes!
by Jamaican By Blood July 06, 2004