5-10-1 Share definition Flag A girl who is rated a 5 in the low light of the bar, a 10 after a lot of beer, and a 1 in the morning, after having sex when she was a 10. I picked up a 5-10-1 last night, i was way too wasted. 5-10-1 by Conorh April 28, 2006 0 0 Get merch Get the 5-10-1 mug. Buy Now — $32.95 See more merch