A pullicologist is an expert on fleas
Pullicologist
Expert, Knowledgeable, etc..
trash and treasure market
An expert at table talk is called a deipnosophist.
Horologist
A mathematician.
A language expert is called a linguist. Linguists study the nature of language, its structure, and its use in communication within a specific cultural context.
Horologist
Horologist
Toxicologist.
They probably called it a flea market because fleas can crawl in and bite people up.
A biologist
A cloudologist, or a meteorologist.