We found one dictionary that defines the word fatty fatty boom batty:

Slang (1 matching dictionary)

1. Fatty Fatty Boom Batty: Urban Dictionary

▸ Words similar to fatty fatty boom batty ▸ Usage examples for fatty fatty boom batty ▸ Idioms related to fatty fatty boom batty ▸ Wikipedia articles (New!) ▸ Words that often appear near fatty fatty boom batty ▸ Rhymes of fatty fatty boom batty ▸ Invented words related to fatty fatty boom batty