1)When the nuts of a man start to sag because he is getting to old to have nice none saggy nuts
2)When your ex-boyfriend starts going out with your bestfriend, this man is sag nuts.
Jamie-You wouldnt believe what just happened
Lauren-What? Tell me!
Jamie-My ex-boyfriend and my best friend are together.
Lauren-O my gosh, what a sag nuts
by fly_by July 17, 2008
Get the sag nuts mug.