Lexical Differences

So I've been trying to keep track of lexical differences in my little notebook, but I often forget them by the time I run to write them down, because I don't always carry my notebook with me. SO far, I've encountered the "pop" vs. "soda" debate many times and heard a few more distinct ones. A little while ago, someone asked for the "flipper" and I did not know that meant "remote control."

One of my favorites was in my math section when a British English speaker asked to have a example explained. The T.A. said that she would explain ti and go in depth into another problem as well. He said "Splendid!" and the whole class turned, looked at him and said "What?!?" He repeated himself and people in the class slowly realized what he meant after he said, "What, you guys don't say splendid?" I think he was a little embarrassed and I have not heard him say splendid again, unfortunately.

Most of the lexical items I have noticed people getting confused by have been words (mostly having to do with food), not phrases or sayings.