know where it's at

know where it's at

to be alert and know how the world—or some part of it—really works. Man, you just don't know where it's at! I don't know where cool jazz is at.
See also: know
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • doesn't know beans
  • (I) can't say as I do(, can't say as I don't)
  • all in (one's) head
  • don't bet on it
  • cast (one's) lot in with (someone or something)
  • cast lot in
  • don't give up the ship
  • don't cry before you are hurt
  • don't get me wrong
  • don't ask me