Knees is a term for someone who is lower than a
cunt. Basically the an extreme insult for someone whose actions and/or
words deserve a harsher derogatory term (i.e someone who is worse than a
cunt)
Jeff: Not only did Ron make fun of Hanks dead
mother, but he killed Hanks dog and raped his sister!
Carl: What a
cunt!
Jeff: No. He's lower than a
cunt. He's knees.