Disclaimer: I think many of these, although not all, can be used as valid tells sometimes. However, I think people frequently drop these words without actually caring what they mean or why they make a person more likely to be scum.
Appeal to authority - This is when a player who is more experienced than you suggests that it is more experienced than you.
Appeal to emotion - This is when a player provides a (usually unsolicited) reason that it might be town.
Buddying - This is when someone defends a player that you think you have a pretty good case on.
Chainsaw defense - This is like buddying, but the guy you're attacking is still scum.
Seriously, people, even the guy who published this tell admits that it doesn't work when both players are still alive.
Defending known scum - A strong tell. Much more reliable than distancing from or ignoring known scum, but a combination spread throughout the game is even better.
Defensiveness - This is when a player defends itself.
Deliberately acting scummy - This is when a person admits to doing something that you believe to be a scumtell.
Distancing from known scum - A strong tell. Much more reliable than defending or ignoring known scum, but a combination spread throughout the game is even better.
Hypocrisy - This is when someone is on a bad wagon, but then the next day acts like people on that wagon are more likely to be scum.
Ignoring known scum - A strong tell. Much more reliable than defending or distancing from known scum, but a combination spread throughout the game is even better.
Knowing too much - See buddying. Only scum could know that the person you are attacking is really town.
Leading the town - This is when people keep nodding along to what a player says, but you can't logically disagree with it either.
Lying - If someone is caught giving two different excuses for a behavior in two different posts,
it must be policy lynched on sight regardless of anything else it has done
.Rushing the day - This is when someone tries to achieve a lynch.
Selective scumhunting - This is the exact same thing as tunnelvision, but tunnelvision refers to stupid townies. Selective scumhunting, on the other hand, is a scumtell.
Setting up mislynches - This is when someone is suspicious of multiple players at the same time.
Unexplained voting - This is when a player explains its vote in a separate post, or votes right below a supposedly scummy post its target made.
Useless to us now - This is when a player has been outed as a power role. If it's telling the truth, scum will just nightkill it anyway.
Vote-hopping - This is when someone moves its vote.
WIFOM - Your case might be right, so someone bringing up alternate explanations counts as this.
