spontaneously combust a nut 

busting a surprisingly immediate nut

I spontaneously combusted a nut in front of my crush

He spontaneously combusted a nut after seeing the lover of his dream

spontaneously combust a nut is defined as being serious in a sense

spontaneously combust a nut by Yourself34245 December 10, 2022

Combustible lemon

A lemon that can burn your house down.

All right, I've been thinking. When life gives you lemons, don't make lemonade. Make life take the lemons back. GET MAD! I DON'T WANT YOUR DAMN LEMONS! WHAT AM I SUPPOSED TO DO WITH THESE?! DEMAND TO SEE LIFE'S MANAGER! Make life RUE the day it thought it could give CAVE JOHNSON LEMONS! DO YOU KNOW WHO I AM?! I'M THE MAN WHO'S GONNA BURN YOUR HOUSE DOWN! WITH THE LEMONS! I'm gonna get my engineers to invent a combustible lemon that's gonna BURN YOUR HOUSE DOWN!

Combustible lemon by TimeDeatH May 22, 2011

Combusken 

A Pokemon that looks like a yellow dick with arms, legs, and a cannabis leaf on its head. Aside from that, it is the evolved form of Torchic and gained the Fire/Fighting type. Once it reaches level 36, it evolves into Blaziken. This Pokemon started the Fire/Fighting type evolution for the next 2 Fire-type starters. Good thing Delphox broke that chain.

Pokemon Emerald: What? Torchic is evolving!
Congratulations! Your Torchic evolved into Combusken!
Player: That's literally a fucking dick...

Combusken by Pokedex #184 October 15, 2017

Shitaneous Combustion 

Unexpected and severe gassy diarrhea.

After eating lunch at the taco truck down the street, I had shitaneous combustion when I got back to work.

Shitaneous Combustion by Htos_Drol November 27, 2012

Mongolian Nut Combuster 

A sexual encounter involving 3 males. One fully naked man is standing with his scrotum dangling and his legs spread wide. The two others are wearing full Mongolian native tribal gear standing 10 yards away from the man. One is facing his front, and the other is facing his behind. They begin chanting, and when the chanting reaches a climax, they both charge head first and torpedo dive into male 1's nutsack causing a full explosion, Then males 2 and 3 use the blood and mutilated testicles to masturbate.

I cant believe i just gave my grandfather a Mongolian Nut Combuster!

Mongolian Nut Combuster by Dogfood11 April 4, 2017

cumbust 

To ejaculate or blow your load rapidly. Used in the porn industry to describe when a guy sprays his cum all over the female actress' face.

How bout I cumbust all over ur face.

cumbust by Rajib May 18, 2005

Combustible lemon

A sour citrus fruit that a man named Cave Johnson invented to make explosive. It is capable of burning a house down.

When life gives you lemons, don't make lemonade, make life take the lemons back! GET MAD! I DON'T WANT YOUR DAMN LEMONS, WHAT THE HELL AM I SUPPOSED TO DO WITH THESE?! Demand to see lifes' manager!! Make life rue the day it thought i could give Cave Johnson lemons!! DO YOU KNOW WHO I AM!? I'M THE MAN WHO'S GONNA BURN YOUR HOUSE DOWN! WITH THE LEMONS! I’m gonna get my engineers to invent a Combustible lemon that burns your house down!

Combustible lemon by beans lad July 26, 2011