An effect, usually brought on by exaustion, alcohol, or a few of the more illegal drugs, which cause a person's eyes to focus on nonexistant points. The resulting effect is that they see two of everything.

After drinking a six-pack and then attempting to reconstruct the string theory, Atom was seeing double.

seeing double by DragonlordALS June 13, 2004

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the double crest

The act of masturbating and brushing your teeth at the same time. This can be performed in any setting.

Note:This act is mostly performed in the shower and does not always require crest toothpaste. Some have even double crested while engaging in the act of sex.

Guy 1: What the hell do you look so happy for?

Guy 2: I just did the double crest and feel fantastic!

the double crest by Malice2.12 December 3, 2010

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zip and a double cup

an oz of weed and a mixture of either codeine, hydro or tussinex syrup and sprite with double the amount of syrup used to get high

yo juicy j got a zip and a double cup lets get faded like him

zip and a double cup by swobbin September 15, 2013

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