Halo3itis 

The condition when one plays Halo 3 nonstop, night and day, and the rest of the world falls by the wayside, girlfriends disappear, your job disappears etc....

I was in my 40th hour of Halo3itis and took the time to answer the phone and listen to my boss fire me, and my girlfriend kept walking in front of the tv with her boxes she was moving out with.

Halo3itis by ScootM October 12, 2007

halo3itis 

When you can only think of nothing but Halo 3.

Jacob couldn't eat, sleep, or even use the bathroom because of his Halo3itis

halo3itis by Johnny S.. October 18, 2007

halo3sis 

the act of playing Halo3 while sleepwalking, or attempting to.

Dude, i woke up with my 360 controller in my hand AGAIN. i think i might have halo3sis.

halo3sis by Dylan Gerson November 6, 2007

Halo3

The video game that steals boyfriends

Girl 1: Liek my boyfriend stopped talking to everyone after he started playing that Halo3 game

Girl 2: Ohmygosh me to, their such dicks

Halo3 by Watersgirl March 17, 2009

Halo3Tuesday 

The art of one taking September 25th 2007 "Halo3Tuesday" off just to play halo 3, this includes work, school, girlfriends, family, and everything but eating and playing halo.

I took the whole week of Halo3Tuesday off which specifically is the infamous Halo3Tuesday Septemeber 25th 2007, from school and work just to play halo 3. I also camped at the mall Monday night before from 6pm til midnight EST. My girlfriend was very "displeased and unsatisfied," but what's really new... haha j/k

Halo3Tuesday by Fireci25 October 15, 2007

halo3osis

its when u just got halo and noticed the the campaign is like a lil longer than gears so u go on online for like 5658 hours till you miss the school bus and realize that the game fuel taste terrible but ur just owing so much u basely just dident care and keep on playing till kidposin owns u and ur relived from ur trance.

guy 1: yo man i have terrible halo3osis and i missed school and that test.

guy 2: o man the test was easy but why did u decide to come in.

guy 1: one word kidposin

halo3osis by dominic sisti January 3, 2009