"Grazie al cazzo" or "E grazie al cazzo" , Italian expression that used to say that what someone has just said is a banality, is an obvious concept (that everyone knew)
Litteraly, "Grazie al Cazzo" is "Thanks the dick! " ( you have to thank your dick for this idea, not your brain) and meaning: " it's obious !"
examples:
A: i'm a human
B: Grazie al cazzo ! i don't think you are an insect
A: If i shoot myself in the head, i will die
B: e grazie al cazzo, you're not immortal
A typical bro, he's chill, mega chill, and loves rolling on babes. Most people think he's the man, but some are intimidated by his skills, namely dropping sick beats, and rolling on babes.
Wow, Chazz just walked out of that party with three chicks. Pffft, Typical Chazz!