Top Definition
When a dick is not hard but its not soft. It is basically a boner that you can flex.

Usually you get a flex boner when drunk.

Can also be referred to as a flex-b.
I was so tanked last night, I couldn't even have sex because all I had was a flex boner.
by Zach2k8 March 12, 2008
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.