A person who knows exactly what another person is thinking, often used in the idiom "[[肚子|肚子|du4 zi5]][[里|裡|li3]][[的|的|de5]][[蛔虫|蛔蟲|hui2 chong2]]".

ascariasis, an infection caused by the roundworm Ascaris lumbricoides

a common parasitic nematode (Parascaris equorum) that infects horses and other equids