Wiktionary
switch-hitter
alt. 1 (context baseball cricket English) A person who can bat either as a right-hander or a left-hander. 2 (context idiomatic colloquial sexuality English) A person who engages in sex with persons both male and female. n. 1 (context baseball cricket English) A person who can bat either as a right-hander or a left-hander. 2 (context idiomatic colloquial sexuality English) A person who engages in sex with persons both male and female.
WordNet
switch-hitter
n. a baseball player who can bat either right or left handed
slang term for a bisexual person