What is the best insult you know and can usr without swearing?

You are a total bungalow. (you have nothing upstairs)

You owe the trees an apology for the oxygen you have wasted in your life to end up such a deluded fool.

is that the best you could come up with? It must have taken you seconds. Did you have help?

the next time you have a thought, you remember to let me know.