Knife Sharpener's Insult Factory

Where the blades are sharp, and so are the words.

Insult 1:

You're so dull, you make a butter knife look like a razor.

Insult 2:

Your personality is sharper than you, and that's not saying much.

Insult 3:

When you walk into a room, the air gets colder.

Insult 4:

I'm not saying you're a failure. I'm saying you're a Failure of a Knife.