Double

A linguistics professor says during a lecture that, "In English, a double negative forms a positive. But in some languages, such as Russian, a double negative is still a negative. However, in no language in the world can a double positive form a negative." But then a voice from the back of the room piped up, "Yeah, right."
In grammar you shouldn’t do double negatives.
It’s a no no.
A Help desk guy speaking to a lady user...
Help desk: Double click on "My Computer".
Lady: I can't see your computer...
Help desk: No... click on "My Computer" on your computer.
Lady: How the hell can I click on your computer from my computer?!
Help desk: There is an icon labelled "My Computer" on your computer... double click on it...
Lady: What the hell is your computer doing on my computer?
Did you hear what happened when the decorator painted his wife with cheese? He double Gloucester!
A woman walks into a bar and asks for a double entendre.
So the bartender gives her one.
A woman walks into a bar and asks for a double entendre.
So the bartender gives her one.
What do you get if cross a baseball player and a monster?
A double header.
What type of fruit includes Barium and double Sodium? BaNaNa.