bladder birth Share definition Flag when you hold the piss in for a super long time, and when you finally let it out, you feel like a new person. i just had a bladder birth after holding my piss in for 24 hours, and i feel like a new man. bladder birth by t0x1c w4st3 March 11, 2021 0 0 Get merch Get the bladder birth mug. Buy Now — $32.95 See more merch