How to Pronounce "flex"
word
Definition
To bend or tighten a part of your body, especially a muscle, to show its shape. Informally, it also means to show off or boast about something you have or can do.
Listen in Context
He likes to flex his muscles at the gym.
Can you flex your arm for me?
She can flex her fingers easily.
He's always trying to flex his new phone at school.