flex

/flɛks/
verb
  1. To bend a joint or limb, especially a muscle, or to tighten a muscle.
    • He flexed his bicep to show off his strength.
    • She flexed her fingers before starting to play the piano.
    • The doctor asked me to flex my foot up and down.
  2. To show off or boast, especially about one's wealth, abilities, or possessions (informal).
    • She wasn't trying to flex; she was just excited about her achievement.
    • He's always flexing his new car on social media.
    • Stop flexing — we know you got a promotion.
Antonyms
noun
  1. The act of bending or tightening a muscle.
    • With a flex of his legs, he jumped over the fence.
    • The pose required a strong flex of the abdominal muscles.
    • He gave a quick flex of his arm to show the muscle.
  2. A flexible cable or wire, especially one used to connect an electrical appliance to a power source (British English).
    • He plugged the flex into the wall socket.
    • The lamp's flex was frayed and needed replacing.
    • Make sure the flex is not trapped under the furniture.
Synonyms