Lacertilia - The worst word you can ever hear from someone who has no lif

The worst word you can ever hear from someone who has no life and hates your existence.

My teacher called me Lacertilia and I had to write 100 times 'I will not be a lazy student.'

I got called Lacertilia and my friend laughed so hard he got a detention.

My brother got called Lacertilia and he ran out of the school like a scared rabbit.