When one is attempting to engage in sexual intercourse with a female and said female uses her vaginal muscles to shut the opening detering one's attempt in any sexual act involving the vagina rendering the male participant "flex zoned"
Jon: I was hooking up with this girl and I couldn't get my finger in and then she told my whole band about it, it was embarrassing.
Chat: Yo, you got flex zoned!
Chat: Yo, you got flex zoned!
by Narwhal Nation September 01, 2014
by Narwhal Nation November 27, 2013