seeing-to         
noun [ C ]  informal uk/ˈsiː.ɪŋ.tuː/ us/ˈsiː.ɪŋ.tuː/
 殴打(某人)
the act of hitting someone repeatedly and hard
  They threatened to give him a good seeing-to. 他们威胁将会打他一顿。 
  humorous与(某人)发生性行为 
the act of having sex with someone