P1 Share definition Flag Turnt. When the level of alchohol in your system is enough to sedate 7 rhinos, 4 black panthers, 18 baby koalas, and 2 school bus full of chimpanzees. Dude the party last night was so crazy. I went P1 and blacked out. P1 by Dragon Cider September 25, 2014 0 0 Get merch Get the P1 mug. Buy Now — $32.95 See more merch