The phrase actually startles a laugh out of Phil. "Thirsty? I am not... you make me sound like a teenage girl at a rock concert. There's nothing that thirsty about being attracted to someone."

He's not thirsty for Clint. That's just such a silly way to say it. He's simply attracted like he has been for a long time. That's all.

Phil ducks his head but there is no way his blush will not be noticed.