boner

noun5

1. •
   (slang, vulgar) An erect penis.

   • Why do guys get boners when they wake up in the morning?
2. •
   (slang, old-fashioned) A blunder; a silly mistake.

   • He really pulled a boner that time!
3. •
   (vulgar, figurative) An often perverse sense of enjoyment from or predilection towards something.

   • Why do politicians have such a boner for meaningless memorials?
4. •
   One who or that which removes bones.
5. •
   (humorous) A trombonist