Adders: short for advantage. To take adders is to make sexual advances to someone who is in a state where they cannot give consent, being drunk or asleep are the most common two states for adders to take place.
Tim: Hey, look Hollie's passed out

Mike: I think you should take adders whilst you can

Tim: Yeah good idea, i'll be back in 2 minutes
by Dr Two Step August 10, 2010

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Top Definition
1. A snake

2. Someone that adds everyone they see on a social networking site for friends
That adder Bob, he added all my friends even though he doesn't know them!
by Toillek November 16, 2007

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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a posonious snake
Steve Irwin almost got bit by an adder.
by Michael LaCombe April 21, 2003

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt