1) An imaginary
animal, probably resembling a
weasel, but more cartoon like. They are said to be mischievous and charming creatures, which allows them to commit atrocities without repercussions.
2) An inanimate object or being on which to blame mishaps, or attribute misfortune
3) A person who takes advantage of,
lies to, or in some way wrongs another, but has the charm and interpersonal skills to avoid punishment or retribution.
"He's as cunning as a dweezil"
"That
darn dweezil emptied my bank
account again, but God love him, he did it for those starving children in
Africa."
"Socks are not lost in the dryer, dweezils, who live in dryer vents eat them and the dryer is blamed."