Less intelligent means "not as smart as" or "not as educated as."

This dog is less intelligent than that dog.

This person is less intelligent than that person.

That man is less intelligent than a box of rocks. (colloquial, this is implying that the man in very stupid)

My high school teacher was less intelligent than my college professors.

Their family dog is less intelligent than that seeing-eye dog.

I am less intelligent than my friend who got a perfect score on the test.

My friend is less intelligent than me because I got a perfect score on the test. (opposite meaning of the previous sentence)

I hope this helps to answer your question! If you need more/different examples, please let me know!

thanks guys :) I asked because I just want to get further explanation with the quote "Sarcasm is the brain's natural defense against the less intelligent."

nicole say right