Light It. 

1. A polite way of saying "go fuck yourself", "fuck you", or even just "goodbye". Short form for "light your ass/self on fire".

2. A way of saying "thank you".

EXAMPLE 1
You: Stop being a bitch.
Me: Light it.

EXAMPLE 2
You: Dinner's on me tonight.
Me: No, you paid last time.
You: No, seriously.
Me: Light it.

Light It. by LB79 September 15, 2008

Light It. 

1. A polite way of saying "go fuck yourself", "fuck you", or even just "goodbye". Short form for "light your ass/self on fire".

2. A way of saying "thank you".

EXAMPLE 1
You: Stop being a bitch.
Me: Light it.

EXAMPLE 2
You: Dinner's on me tonight.
Me: No, you paid last time.
You: No, seriously.
Me: Light it.

Light It. by LB79 September 16, 2008

Light it

When asked to ”light it” one is being asked to provide weed or other drug substance when meeting with one who asked to light it and or giving free drugs

Yo light it
I lit it last time you light it

Light it by dj starr January 22, 2019

light it

1. A polite way of saying "go fuck yourself", "fuck you", or even just "goodbye". Short form for "light your ass/self on fire".

2. A way of saying "thank you".

EXAMPLE 1
You: Stop being a bitch.
Me: Light it.

EXAMPLE 2
You: Dinner's on me tonight.
Me: No, you paid last time.
You: No, seriously.
Me: Light it.

light it by LB79 September 2, 2006

Light it up blue 

A slogan used by hate group Autism Speaks to promote finding a cure for autism. As a result its better to go REDInstead.

Person 1: Let's light it up blue for Autism!
Person 2: No you asshole! Let's go REDInstead

Light it up blue by YeetleSkeeetles April 13, 2019

Light It Up 

Direct a lot of machine gun fire at it.

<car approaching checkpoint>
Sergeant: "Fire warning shots."
<car keeps coming>
Sergetant: "Light it up."

...1000 rounds later...

Private: "Shit, shit, that car was full of orphans and nuns. Dammit!"

Light It Up by joej30983hn February 13, 2006

light it up red 

A slogan that supports autistic people to freely express themselves. This goes in contrast to "light it up blue" which only promotes the awareness of autism, even though almost everyone has at least heard of autism by now. "light it up red" however, promotes respect and acceptance towards autistic individuals and is a more meaningful way to promote the autistic community.

Red is the color of love, ambition, and respect. Blue is the color of disappointment and depression. Lets light it up red instead to let everyone know that the autistic community is capable of understanding and respect.

light it up red by Dubiks December 6, 2018