Which sitcom catchphrase have you adopted?
I've picked up what Red frequently calls Eric in "That 70s Show".
Hint: begins with d and ends with s.

I use a lot of them. Probably the one I use most often is from a movie, not a sitcom. If somebody tells tells me something relatively insignificant which they think is of great importance because it happened to them I'll use one of my favorite lines from the movie Arthur, "I'll alert the media".

I used to say "absotudelutely" a lot, because I found it funny when Steve Urkel said it.

And here's another usable one from Steve Urkel, that he only used in one episode: "Oh well… Pee break!"

“Fe-fe-fe-feeeeny”: Eric Matthews from Boy Meets World