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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A chain of events twinned to a working process designed to add value to a clients journey. Depicted by a cartoon snake. (Credit for process - Mike Horsley, Credit for Name - Michael Thorpe)

Idea was then taken fraudulently by W. Grasshoff and delivered as his own work (Shakes head in disapproval)
The Value Adder ensured the client received a top level service from start to finish.
by Micky83 January 4, 2019
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Someone who is good at maths. More specifically addition.
Mark is good at counting money, you may even say, he is a good adder-upper
by TempestTheHedgehog March 4, 2017
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Rowan Atkinson's awesome British "toilet humor" sitcom, starring Rowan as an anti-hero character known as "Black Adder". There have been no fewer than four runs of Black Adder. In each of the series our hero finds himself in a different situation, where his ambitions are doomed to failure time and again.
Hugh Laurie from "House" portrayed Black Adder's bitch in all of the Black Adder series.
by Alfie The Horndog August 11, 2005
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a person who collects a lot of people of other sex on facebook or any other social network to show her/his ex boy/girlfiriend that there is no lack of sexual partners.
she got 20 new male friends. looks like she wants to make her ex boyfriend jealous. she is such an sexcessive adder.
by john mf kimble August 31, 2011
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A phantom adder is when you or somebody else adds somebody on facebook whom they dont know, guys usually phantom add hot girls , promoters usually phantom add everybody, friends of friends of friends to promote their crap electronic dance music nights and weirdos phantom add to increase their friend count so they feel popular.
I phantom added this hot girl on facebook last night, she was only 18 but god dam I couldnt resist, might have a little face wank over her later. I am such a champion phantom adder

This weirdo from work called John Mackay phantom added me yesterday, he also added everybody else with the same name as me, what an odd ball, the other people with my name must have thought "whos this gimpy phantom adder"
by Kurtamin March 28, 2011
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The 1st season of Rowan Atkinson's awesome British "toilet humor" sitcom, starring Rowan as an anti-hero character known as "Black Adder". It became "Blackadder" from 2nd season onward. There have been no fewer than four runs of Black Adder. In each of the series our hero finds himself in a different situation, where his ambitions are doomed to failure time and again.
Did you watch Black Adder?
by The LittleFlyer June 8, 2013
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