“It ain’t a Justin Timberlake concert”
A phrased use towards someone being said or having a whinge or just plain feeling sorry for themselves. It’s said in reference to Justin timber lakes song “cry me a river”. To let those know, just get over yourself, life isn’t that bad so dry cry me a river, get over it.
Person winging: why does this always happen to me, what’s the point of trying
Mate: come on mate, “it ain’t a Justin Timberlake concert”