stag stag /ˈstæg/

noun

1. Adult male deer  ( stag )
   adult male deer
    The magnificent stag stood proudly atop the hill, overlooking its territory.
   The magnificent stag stood proudly atop the hill, overlooking its territory.
   
   
2. A male deer, especially an adult male red deer  ( hart , stag )
   a male deer, especially an adult male red deer
   
   

verb

1. Watch, observe, or inquire secretly  ( sleuth , stag , snoop , spy )
   watch, observe, or inquire secretly
   
2. Give away information about somebody  ( denounce , give away , grass , betray , rat [Informal] , shit [Vulgar] , shop [Informal] , snitch [Informal] , stag , tell on )
   give away information about somebody
    He told on his classmate who had cheated on the exam
   He told on his classmate who had cheated on the exam
   
3. [ N. American] Attend a dance or a party without a female companion  ( stag [ N. American] )
   attend a dance or a party without a female companion