Nov. 9, 2004 Share definition Flag 1.The final setback until Halo2 is finally released. Also known as HaloTWOsday. 2.A tuesday in November of Two Thousand Four. 1. Yo, Bitch! ITS MOThER FUCKING HALOTWOSDAY!! 2.YOU BITCH ITS MOTHERFUCKING HALOTWOSDAY. Nov. 9, 2004 by Nik Matt September 25, 2004 Get the Nov. 9, 2004 mug.