Captain America/Dean: "son of a bitch!" "Shit." "Watch your language Sammy!"
Winter Soilder/Cas: "who the hell is Castiel?"
Black Widow/Charlie: "shall we play a game?"
Thor/Sam: "you're big, I've fought bigger." (Not sure Sam would say that but he did say that thing about torture and Lucifer so..."
?????
Loki/ Gabe: "I am the trickster, son of God." (Best I could come up with)
Iron Man/Kevin: ???
Hulk/Garth: ????