Geoff day Share definition Flag When you start drinking at 5 A.M. and pass out drunk before your kid wakes up. My husband was supposed to take the kids to school, instead he pulled a Geoff day and didn't wake up until the evening. Geoff day by UMPiCK January 11, 2015 0 0 Get merch Get the Geoff day mug. Buy Now — $32.95 See more merch