What exactly is whinging? It sounds like some sort of sex act involving wincing I do believe the word you were looking for is whining. I blame No Child Left Behind for all the bad spelling on the internet
Oh you funny lil Americans *ruffles hair*
Whinging is most definitely a word.
(whinge) A cry; A complaint; To complain, especially in an annoying or persistent manner.
It means pretty much the same thing as whining, they are synonyms.