/vɛkˈseɪʃəs ˈlɪtɪɡənt/ – Phrase
Definition: Người kiện cáo phiền hà
A more thorough explanation: a claimant who brings a lawsuit with no chance of success, especially a lawsuit designed to upset or annoy the defendant
Example: The court may prohibit a vexatious litigant from filing any new litigation in California.