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Noun:

1) A person that works in a malicious and sinister way, to his/her own end, not caring who it affects.

2) A person that acts in a sneaky or conniving manner, to further their own ends, to the detriment of others and, all the while, denying any wrong-doing.
That landlord is a real sleasel. sleazy weasel
Sleasel by Gretschman January 11, 2016
Related Words

Sleazelexia 

When reading a line of text, your brain switches out a word or words, making an innocent sentence dirty.
When reading Harry Potter, my sleazelexia kept changing the word "wand" to "wang".

He wrote he wanted me to get him a pumpkin but I read it as blumpkin.
Sleazelexia by Curbylicious November 9, 2014
Combining the word snake and weasel to produces the ugliest, ratiest, fakiest, liar that your will ever meet in your entire life or if you believe in that stuff lives.x
p1 :Dang that boy a sneasel.

p2: What you mean?
p1: I mean that he be talking made trash about you behind your back
p2: Dang!
Sneasel by King panter March 30, 2022
One who is both smug and a weasel.

People of this ilk take great pleasure is possessing these characteristics because they are smug weasels.

Jaycob Mullingham Turner III of Chelmsford Chelmsfordshire is the only known living example of a Smeasel.
'That guy Jake has such and smug face and the personality of a weasel'

'Yeh, that's why they call him Smeasel'
Smeasel by Wickery January 16, 2014
"You ever see Sneasel? What a champ that boi is.
sneasel by No Noses March 14, 2019
1) A creepy guy who cracks on to girls in unsubtle ways.

2) A guy who tries to initiate sex with a girl in boorish offensive way.

3) A sexual harasser.

4) An active pervert (as opposed to a peeping tom which is passive pervert).
I just sat next to him and the slease tried to put his hand up my dress.
slease by K.C.D.L May 24, 2004