When Priya makes chili and Sheldon goes off on how real chili doesn't have beans in it - "This is good...whatever it is!"
My DH and I say that every time we eat chili with beans - including last week in front of my parents, who don't watch the show and were very confused as to what we were talking about.
Raj's "I'd rather get a prostate exam by a leper who walks away with three fingers" (or something like that).