a snake in the grass is a sly person whos always doing things behind peoples backs.
e.g.
-slithery one.
-an eva cowzer: "im a snake in the grass"
by gemmeeg February 8, 2010
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A shady, conniving person who could strike at anytime without warning. Similar to a gorilla in the mist.
Mary: "I've had enough of your insensitivity! I'm leaving!"
Larry: "Hey, quit blocking the TV!"
Mary: "I'M LEAVING YOU, YOU ASSHOLE!!!"
Larry: "So what? Oh damn, did you see that catch T.O. just made? Un-be-fucking-lievable!"
Mary: "I think I'm going to start seeing Fred, from the office. He's a real gentleman and can fulfill my needs, unlike YOU!"
Larry: "Whatever, bitch. That guy's a real snake in the grass, don't waste your time. It's halftime...get over here and hop on my johnson."
by Nick D March 4, 2005
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the term refers to a long rolled out piece of bubble/full melt hash laid inside a joint or blunt. the hash, resembling a thick piece of spaghetti, usually a dark brown or black, is the "snake" in the marijuana "grass"

NOT recommended for novice smokers
W: "hold on a sec. im rolling the hash out. we gotta put the snake in the grass before we light it up"

J: "the snake. oh god. the snake will get you"

W: "the snake always gets you"
by my iq is 55 February 14, 2011
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(eBay terminology) Someone who watches an auction but doesn't bid until the last minute.
As long as there isn't a snake in the grass, that voodoo doll is mine!
by Reyn October 20, 2005
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a very shaddy person with multiple levels of snake's depending on how many times they've been doing shaddy things and defferent levels of grass depending on how mischievous the most mischievous shaddy was

slithery slithery snake - will do a shadyy thing almost every day
slithery snake - with occasionally preform shaddy acts
snake - once or twice did something shaddy

tall ass grass - did the most mischievous thing ever

tall grass - did something more shaddy than most
grass - did something that on average snake in the grasses will do
Bobby - "Did u hear, Jake kidnap Ron and take him 3 hours away to the ocean without telling anyone"

Steve - "yeah Jake was a slithery snake in the grass but im pretty sure now he got upgraded to slithery slithery snake in tall ass grass"

Bobby - "thats what the hell I thought...thank you grandma"
by tommyboy533 December 29, 2011
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usually in a dark room a guy tucks his erect penis between his legs and then slaps his confused mates face with it as they are approaching that area to provide oral satisfaction.
Dan left a red mark on Sarah's face after he played "snake in the grass" on her
by MelissaMaybe November 25, 2005
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When a construction worker is slaking off and going un-noticed.
What was that...It's A.....Snake in the grass
by Eric Sawchuk September 13, 2007
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