Iti boribo.

An Iti boribo is a person who is not intelligent.

When you find it hard to understand simple words, or anything at all, you're referred to as an Iti boribo.
Synonyms: Dumb, Daft, unintelligent.

1. Daniel is an Iti boribo. He doesn't understand simple French.
2. Mary couldn't differentiate breath from breathe. She is just an Iti boribo