{adj.}

1. describes a substance capable of causing harm or death, biochemically, to an organism or the environment

2. imparting a bad influence on something; potentially fatal

2. in the near future, as a result of this UD definition, the new it word for cool.
1. Hydrochloric acid is a toxic chemical.

2. Religious fundamentalism is toxic to the human race.

3. Dude, that's a sick fuckin' shirt - it's so sick it's toxic!
by Leroy Brown 420 February 4, 2009
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When someone is a REALLY good flirt AND always flirting/seducing someone of the same or opposite sex.
He's soooo hot and was being his toxic self when he brushed my arms and whispered in my ears.
by Sydster September 12, 2010
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A song by Britney Spears that not only sound good, but is accompanied by an ultra-sexy video that will make even the queerist of men blow their loads all over hell and half of Georgia.
OMFG Britney Spears was hawt in Toxic!!!
by SAOG April 9, 2005
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something to describe an event as being too busy or hectic. It can also be used to describe a stressful person.
Amanda's got a lot of work to do in the office. I don't want to stick with her. She's so toxic.
I have a very toxic schedule. Go away.
by lee30 June 19, 2008
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a word that can be used to describe something as either extremely good or extremely bad, depending on tone of voice.
wow, that guy has a rockin' bod, it's straight up toxic

or

jeez, that test was so hard, it was toxic, I really thought i was gonna die
by Lizaa June 10, 2007
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mostly known as dickmaster69 but also known as robbie is the incarnation of toxisity and is very mean to his buddies and i hope he stops soon
robbie is toxic
by toxicrobbie May 14, 2019
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When somebody is so ignorant that when you prove them wrong, even if they believe you’re right, will get mad at you. In this persons brain they are the greatest, not at their job and stuff like that, but at EVERYTHING. They make anything they touch turn to gold in their mind. These same people will also usually make a “point” and then not let you talk after because they feel they’ve proved you wrong and their answer is 100% true.
Ben: “She’s so toxic, I’m not even allowed to voice my opinion around her”
Terra: “You can’t leave though she’ll tell everybody you’re a f*ckboy”
by CordelleLK June 18, 2020
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