Definition

1. Verb phrase:
   • To defecate: To excrete waste matter from the bowels. This is the standard, formal, and polite term for the biological act.
   • To have a bowel movement: A common and neutral medical/polite expression for the same act.

Usage Examples

• Verb phrase:
  • Trẻ em cần học cách nói "đi đại tiện" một cách lịch sự. (Children need to learn how to say "to defecate" politely.)
  • Bệnh nhân được hỏi đã đi đại tiện hôm nay chưa. (The patient was asked if they had had a bowel movement today.)
  • Anh ấy vào nhà vệ sinh để đi đại tiện. (He went to the bathroom to defecate.)

Advanced Usage

• The phrase is often used in formal, medical, or polite contexts. It is considered much more appropriate than slang terms.
• It can be used in public health announcements or instructions.
  • Mọi người cần rửa tay sau khi đi đại tiện. (Everyone needs to wash their hands after defecating.)

Variants and Related Words

• Đi vệ sinh (v): To use the restroom/toilet. A very common and polite euphemism that can refer to both urination and defecation.

  • Cháu xin phép cô đi vệ sinh ạ. (May I please go to the restroom, teacher?)

• Đi ngoài (v): A common, slightly informal term meaning to have diarrhea or, more generally, to defecate. Often used in medical contexts.

  • Bé bị sốt và đi ngoài. (The baby has a fever and diarrhea.)

Synonyms

• To defecate: The direct formal synonym.
• To have a bowel movement: A neutral, descriptive synonym.
• To go to the bathroom (euphemism): A general polite term.

Related Idioms

• There are no common idioms directly using the phrase "đi đại tiện." The concept is typically expressed through euphemisms or slang in idiomatic speech.