When a person who likes to steve it up rampantly looks at other people's screen in multi player Halo.
Kills you, and then denies he even looked at it. These people are usually the first to accuse others of the offence.
Doopa: "How did you know I was there."
T: "I saw you on radar."
Doopa: "The radar is turned off, you Halo Cheatin' Dog."