Top Definition
similar to beer muscles, only instead of gaining courage to trash-talk through alcohol, it is gained through being on MySpace in the comfort of your own home without the fear of any consequences coming from your trash-talking
Girl: "Ya, well you don't even know. I will come up to you and punch you in the face if I ever see you"
Guy whom girl does not know in real life: "/lol @ your myspace muscles"
by Himes December 27, 2007
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