drop a dime in English dictionary drop a dime Meanings and definitions of "drop a dime" (idiomatic, slang) To make a phone call, usually means calling the police to report another's activities. verb (idiomatic, slang) To make a telephone call, usually calling authorities to report another's activities. verb (slang, with on) To inform (on). more Grammar and declension of drop a dime to drop a dime more Sample sentences with "drop a dime" Declension Stem Match words all exact any Try again Authors