A humorous or pseudo-scientific study of bumps, particularly their patterns or meanings.
From bump plus -ology (the study of something). This appears to be a jocular modern coinage, playing on real terms like phrenology that claimed to read character from head bumps.
This word is a funny invention that mocks phrenology—a genuinely believed pseudoscience where people thought bumps on your head revealed your personality! English loves creating '-ology' words, even silly ones.
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