someone who teases you, tricks you, does something sneaky or mischievous. to call someone a sleveen is a form of affection and playful. Word used in the Maritimes as a form of affection.
after having a silly prank played on you, you might respond by saying " oh, you are such a sleveen."
pronounced: Sleeve veen
A sly , creepy or untrustworthy individual. Usually directed at pikeys or inhabitants of Manchester.Pronounced
'Don't let that sleveen twat anywhere near my kids !
'I wouldn't trust that fucker with the lotto tickets, everyone knows he,s a dirty sleveen bollix