Top Definition
flex your face; smile; grin; look up; be alert
while throwing a ball, shout "flex yo face" to alert the catcher the ball is coming;

may also be used while taking a photo to get people to smile
by Sweet Addiction September 19, 2006
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.