Quote from Barney in Unpause
Future Ted: [v.o.] Kids, in all the time we knew Barney, there was one question he would always answer the same way. [flashback:] Marshall: Seriously, what is it that you do? Barney: Ha-ha-ha. Please. [flashback:] Lily: Seriously, what do you do for a living? Barney: Ha-ha-ha. Please. [flashback:] Marshall: You finally gonna tell me exactly what your job is? Barney: Ha! Please. [present:] Future Ted: So naturally, this was a pretty big moment for us. Ted: Well? What do you do for a living? Barney: Please. Robin: He's not telling us. More booze. Ted: Not so fast, princess. I guess subtle clues and the bar tab are two things you don't pick up. Because I think he is telling us.