泣き虫

1. Origins, structure, and basic meaning

• Structure: 泣き虫(なきむし) means a crybaby, someone who cries easily even over small things.
• Basic usage: It describes a childhood tendency to cry or recalls a name someone was called.

2. Common pitfalls and similar expressions

• The nuance of a label for a person
  • 泣き虫 refers to a person who cries easily, not an insect. It can be used to tease someone.