To sing the Halo theme song in the restroom while standing still doing the T-pose

Large, beautiful breasts that are keep well consealed and initially appear to be much smaller and less impressive than they actually are until unleashed.

To play halo for long periods of time

a relatively obscure fetish in which a man dresses as a Halo marine while getting a lap dance from a large woman representing a Covenant Brute.

The act of pulling out just before ejaculation, and moving your penis in a circle around a felmale/males anus thus creating a white halo

Bunnyhopping constantly like a complete FUCKING noob all the time. Comes from Halo Series' ridiculous jump height and notoriety for bunnyhoppers.