Someone who puts on a false veneer of uber politeness to strangers, great aunts, and authority figures. Insincere sweetness. A suck up. Those who employ this technique can be referred to as a "cheddardick".
Natalie: Look at that guy!
Kelly: Ooo his biceps
Natalie: No No No his sculped abs!
Kelly:His face!... he is soooooo gorgeous!
Natalie:omg he is..... Chedderific..
Kelly: I think Your right..