Quote from Robin in Slap Bet
Barney: Well, obviously, I've been proven right, so in the interest of Robin's dignity, I won't show anymore. Plus, it's getting late. It's already slap o'clock. [Barney slaps Marshall] Robin: What the hell was that? Barney: I slap bet Marshall that you did porn, so I win. Robin: Porn? I wish it was porn, it would be less embarrassing.