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.
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 talkingmade trash about you behind your back
p2: Dang!