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

Cumbust 

To have performed sexually at such a profound level that the utilised orifice has caught fire due to friction.

This could be down to a number of factors:
1. Overly fricative appendage surfaces, e.g. a scaley penis
2. Use of a lube with an insufficient smoke point for the activity, e.g. high-velocity anal sex lubricated with Butter (176°C) rather than Ghee (250°C) that meets an emulsifier, e.g. 'Baby Gravy', thus overcoming a natural fire retardant, e.g. 'Fannybatter'

Example 1 is pure friction but usually occurs before Cum enters the picture so is not relevant to this analysis
Example 2 is the true Cumbust in that it is down to the complex chemical interations of these substances when extreme kinetic energy is applied to them

Bob - Jesus, did you see what happened when Bill banged Brenda's Bum hole?

Babs - Nope, wtf?
Bob - She Cumbusted, flew into low earth orbit, left a trail of winnets in the night sky that looked like a meteor shower
Babs - Shit, talk about blasted into maternity by a guided muscle....

Cumbust by Sick Man Fraud December 16, 2022

Cumbust 

When you get so excited that you ejaculate without notice.

Keep ordering me oyster shooters and I might just cumbust.

Cumbust by RJ3000_ August 16, 2019

Cumbust 

A word used as a reaction to someone hot, or doing something hot.

Sarah: if I was ever in the car with that girl I’d combust
Rachel: I’d Cumbust

Cumbust by Ireland Ireland May 3, 2023

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

Cumbussable 

Someone who not only makes you horny but makes you want to cum just thinking about them. Just the thought or sight of them makes you want to nut all over and/or inside them.

duante: Look pear-shaped bitches like brianna love, mya g and miya g, they be so cumbussable

kanye: ye gentles got a ass that would swallow up a g-strings and up top, two bee stings

Cumbussable by DuanCulo aka Duante Amorculo August 5, 2014

Combust 

To get turned on or about to feel a certain emotion.

Maria: Jimin looks so hot I’m about to combust!
Anne: dang me too

Combust by Mariethemaria May 29, 2019