Definition

1. Verb (colloquial, often pejorative):
   • To act tough / to posture aggressively: To adopt an exaggeratedly aggressive, defiant, or confrontational attitude, often to intimidate others or to overcompensate for a lack of real power or confidence. It implies a performance of bravado.
   • To get on one's high horse / to bristle: To react with sudden, exaggerated anger or pride, becoming defensive and combative.

Usage Examples

• Verb:
  • Anh ta không có quyền lực thật, chỉ thích lên gân với nhân viên. (He has no real power, he just likes to act tough with the employees.)
  • Đừng có lên gân với tôi! (Don't you get all aggressive with me!)
  • Nó vừa nghe phê bình đã lên gân ngay. (He immediately got defensive and bristled upon hearing the criticism.)

Advanced Usage

• The phrase often describes a sudden shift in demeanor, where a person inflates their ego and adopts a threatening posture. It is frequently used in contexts of arguments, challenges to authority, or displays of false courage.

Variants and Related Words

• Lên giọng (v): to raise one's voice or tone arrogantly.
  • Anh ấy lên giọng dạy đời người khác. (He adopted a lecturing tone to preach to others.)
• Lên mặt (v): to put on airs, to act superior.
  • Có chút thành tích đã lên mặt. (He got a little achievement and started putting on airs.)

Synonyms

• To bluster: To talk in a loud, aggressive, or indignant way with little effect.
• To flex (one's muscles) (figurative): To make a show of strength or power.
• To strut: To walk with a proud, swaggering gait, implying arrogance.

Related Idioms

• Lên gân lên cốt: An intensified form of "lên gân," meaning to act exceedingly tough or to put on an extreme show of force and defiance.
  • Hắn lên gân lên cốt để dọa mọi người. (He puffed himself up to the extreme to intimidate everyone.)