Daijoubu

In Recettear, one of the character's voice lines is them saying "Daijoubu", which is Japanese for "Are you okay?". This is what one character says to another when they take damage in combat. Joe didn't know what Daijoubu meant at first, but then someone in chat told him. But then he kept on pretending that he didn't know what it meant, so because of the context in which is plays, he pretended that it meant "Damn, you just got wrecked".