switch-hitter

noun3

1. •
   A person who can bat either as a right-hander or a left-hander; an ambidextrous batter.

   • The average ball player can become an effective switch hitter only if he has switched hit from the time he commenced playing. — 1961
2. •
   A batsman who performs switch-hits.
3. •
   (slang) A person who has sex with both male and female partners.

   • I met this fat, balding, bisexual 'switch-hitter'— that was his word, 'switch-hitter'— and he was my first experience." — 1983