When your veins start to show up and appear all over your body. You can feel them and somtimes play with them and you can basically count them. Usually happens in your arms, hands, legs, and feet. The reason behind it happining is unknown but it freaks the shit outta me.
Dude 1: Omg man, when i got outta the shower and looked in the mirror, i saw all my veins. I looked like a fucking blue lines alien.
Dude 2: Damn dog, you just had a vein attack. Crazy shit