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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
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Jul 27 Word of the Day
the whale tail is the shape formed when a g-string rides up high over a womans trousers
oh my god look at that butt, her whale tail is showing so high!
by garv November 10, 2003
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