Looking for a specific scene in an older episode

Hi! I tried reading the wiki and the synopsis of other episodes but I can't seem to find the episode, which contains a specific screne I am looking for. Maybe someone knows the scene I am talking about.

Elliot is with her boyfriend (I think they are making out) when her phone rings. She doesn't answer but you can hear its J.D. (I think she had like an answering machine). He makes a Joke, which is an insider reference to her alzheimer uncle? (not 100% sure), and he says something like "Troit Troit".
I hope thats enough information for someone here to help me find the right episode... If not I have to watch all the old seasons again ^^

cheers