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.
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.
A sexy youtuber known for his Zombies Commentaries. Best known for being beautiful, nice, and having a sexy voice. Rumor tells that viewers watching him have a tendency to remove clothing when they hear its harmonic melody.
"Dude, DeadshotDivinity is in our lobby" - Guy
"WHY AM I NAKED" - Girl