Who is cutting onions

Last updated: April 1, 2026

Quick Answer: This phrase is a popular idiom used humorously to explain why someone has tears in their eyes, typically implying emotional sadness rather than actual onion cutting. It originated from the real phenomenon that onion vapors cause eye irritation.

Key Facts

The Science Behind Onion Tears

When onions are cut, their cells release a chemical called syn-propanethial-S-oxide, which irritates the eyes and tear ducts. This compound is released as a vapor and triggers the eyes to produce tears as a natural protective response. The reaction is involuntary and affects anyone cutting raw onions, regardless of skill level.

Origin of the Idiom

The phrase "who is cutting onions?" became popularized as a humorous way to acknowledge tears without admitting emotional sadness. The idiom plays on the legitimate reason for tears, allowing people to maintain composure while expressing emotions. It became especially popular in internet culture and social media as a relatable way to respond to emotional moments.

Cultural and Meme Usage

The expression has evolved into a meme and cultural phenomenon, particularly on social media platforms. People use it when watching emotional movies, reading touching stories, or experiencing sad life events. The phrase is recognized across multiple languages and cultures as a universal way to acknowledge emotions with humor.

Methods to Reduce Onion Tears

Cooks have developed several techniques to minimize eye irritation while cutting onions. These include chilling the onion before cutting, using sharp knives that damage fewer cells, cutting near running water or ventilation, wearing glasses to shield eyes, or soaking onions briefly before cutting. Some professional chefs use these methods to maintain comfort while preparing large quantities.

Nutritional and Culinary Importance

Despite their tear-inducing properties, onions are essential ingredients in countless cuisines worldwide. They provide flavor, nutrition, and are rich in vitamins and antioxidants. The same compounds that cause tears also contribute to onions' health benefits and distinctive taste profile.

Related Questions

How can I cut onions without crying?

Chill onions beforehand, use sharp knives, cut near running water or with ventilation, wear glasses, light a candle nearby to absorb vapors, or soak onions in water before cutting.

Why do onions make you cry?

Onions contain sulfur compounds that release irritating vapors when cut, triggering tear production as the eyes' natural protective response to irritation.

Is it bad to cry while cutting onions?

No, it's a completely normal physiological response and not harmful; the tears are simply your body's way of protecting your eyes from the irritant vapors.

Sources

  1. Wikipedia - Onion CC-BY-SA-4.0
  2. Britannica - Onion Proprietary