left field

noun

• 1 Baseball the part of the outfield to the left of the batter when facing the pitcher:a high fly to left field

• 2North American informal a surprising or unconventional position or style:seldom do so many witty touches come out of left field
• a position of ignorance, error, or confusion:he’s way over in left field on these issues

adjective

• (of artistic work) radical or experimental:left-field guitar-based music