The spelling of the word "ferb" in the children's TV show "Phineas and Ferb" is phonetically transcribed as /fɜːrb/. This means that the sound "er" is pronounced with a schwa sound, as in "her" or "bird". The "f" and "b" sounds are pronounced normally. This unique and whimsical spelling adds to the distinctive nature of the character and the show as a whole. While unconventional spellings in media can sometimes be confusing, "ferb" is easy to decipher thanks to phonetics.