word of caution, pick a rude one it can backfire.
my grandson changed ringtone for his number to 'jingle bells' the version was using - lets say an 'abdominal instrument'.
so i'm at dinner with a very important client and his wife when he phones me. panic set in as i could not get my phone from my trouser pocket (griffin case), then it flew out to the side onto the floor under a bench seat supporting a very large lady - not being in my pocket it was now at full volume, and i'm now in a very compromising position, this poor women and i getting very inquisitive looks!
embarrassing just did not cover it