Quote from Barney in Challenge Accepted
Marshall: Hey, babe. The gang says feel better. Lily: Thanks. Wait! You didn't tell them I had food poisoning, did you? Marshall, when it's stomach stuff, you just say "under the weather", or people start picturing you doing unspeakable things. Marshall: I know. I just said that you had the sniffles. No one is picturing anything but little red-nosed you under a blankie with some hot tea. [meanwhile at MacLaren's:] Barney: I wonder what end it's coming out of Lily right now. Robin: I bet it's her tushie. Barney: I bet it's both. [imitates explosions] Hey, speaking of explosions... Enough already, Ted! That button's mine!