onto someone/something

onto someone/something

mod. alerted to or aware of a deceitful plan or person. Wilmer thought he was safe, but the fuzz was onto him from the beginning.
See also: someone, something
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • rob (one) blind
  • rob blind
  • rob somebody blind
  • rob someone blind
  • fuzz man
  • fuzz station
  • nourish a viper in (one's) bosom
  • nurse a serpent in (one's) bosom
  • nurture a serpent in (one's) bosom
  • nurture a viper in (one's) bosom