Well, personally speaking, ''namibia'' never seems to come out right on the r/t, and i can never say royal nipple with out smirking!!
Then theres UKA7YL that has come out as lanky lima before, and BMA70Z although I havent seen that one around for a while...
oh and lets not forget ''dagobert'', the second most stupid callsign in the world after ''Baby''!!!!!!!!!!