(as) cocky as the king of spades
Conceited or haughty. Don't invite Joe to lunch unless you want to hear him brag about all the important things he's doing in his new job. He's just as cocky as the king of spades lately.
*cocky as the king of spades
boastful; overly proud. (*Also: as ~.) He'd challenge anyone to a fight. He's as cocky as the king of spades. She strutted in, cocky as the king of spades.