I wonder if anyone here will know this one;
I learned the word "obsequious" over a decade ago while working the line of a restaurant. I used to listen to the 2p2 (2 plus 2) poker podcasts during prep and they had a regular feature with David Sklansky (iirc) giving tips, stories, advice etc. This particular one he simply gave the word "obsequious" and defined it later. I remember my sous chef and I were debating what it could mean and I guessed it right. I still can't remember what it had to do with poker, but that's besides the point.
Maybe I can locate it