Your face makes onions cry.
Onion Tears
Categories
Explanation
Experiment
Explain Bear
Listen up, buttercup. This "joke" is saying your face is so ugly, it makes onions cry. Onions cry because they release a gas when they're cut, which reacts with your tears, making them sting. So, basically, you're uglier than an onion being diced. And given your brains, I think you might be one.