Headscratchers / Worzel Gummidge

• To speak Worzelese, you basically spell out a word in English but put "wor" between each letter and at the end, you say, "wor" again and then add "dip" for words with three or less letters or "zel" for words with four or more letters at the end (Worzel's first name, for instance, is W-wor-O-wor-R-wor-Z-wor-E-wor-L-wor-zel). He obviously got the syllables "wor" and "zel" from syllables of his own name, but where did he get "dip" from?