In Australian speech deadshit is used for someone who is the lowest of the low. You can call your friend a bastard, fuckwit or cunt if you are momentarily mad at them, and it puts them on notice that you are not amused, but if you call them a deadshit , then the relationship is pretty much over. It signifies a line has been crossed.
When a friend is excited about something you offer him a High five, when he goes to slap your hand put your hand limp and forward so that he slaps the back of your hand, at this time you shout "deadphish". Your friend will most definitely be disappointed and insulted.
I just pwned kleiner so hard when I deadphished him after his winning pong shot.
The most final of all insults outranked only by 'fucking deadshit'. To be used only when you feel such utter dismay and disgust that no emotion or single word would suffice. to be said in a dull monotonous voice whilst shaking or clutching the head.
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."