My cousins and I used to throw in words pronounced backwards, sometimes whole sentences, much to the confusion of those not in on the game. Of course some words just don't work backwards, others sound great, like munimula or "krap the rac." Most of us lived in sasnak, but I had a cousin in salad, saxet, another in ahamo and one in odaroloc gnirps.
Kuf, tish, traf, and sip were favorite teenage words, of course. I drove a negawsklov gub, my brother had a nilmerg, mom drove a drof. Beyond silly, but great fun at the time, and we'll still throw out a drawkabs drow every now and then.
Lindy