There's a funny Stop sign near my house that says "Hammertime" under it. It always makes me smile and remember when "U Can't Touch This" by MC Hammer was a huge hit. Apparently there are quite a few Stop signs with graffiti pertaining to song lyrics.
The bathroom wall words might prove to be very interesting as are evident from these examples. These funny bathroom wall quotes and bathroom wall sayings will just kill you with the wit present in them.