What are some insults that start with K?

Answer 1

A bit old and Shakespearean, but "knave" has been a goofy favorite of mine for a while.

; Main Entry: : knave ; Pronunciation: : \ˈnāv\ ; Function: : noun, ; Etymology: : Middle English, from Old English cnafa; akin to Old High German knabo boy ; Date: : before 12th century 1archaic a: a boy servant b: a male servant c: a man of humble birth or position2: a tricky deceitful fellow

"Go to, you are saucy knave, this trick will scathe you one day, I know it" - Romeo & Juliet