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.
by Rajib May 18, 2005
 Get the cumbustmug.
Get the cumbustmug. by CWeed, Browniemixx, Echo January 11, 2009
 Get the Cumbustionmug.
Get the Cumbustionmug. by owner of a psychotic dog October 17, 2014
 Get the cumbustingmug.
Get the cumbustingmug. by EBRJ July 9, 2010
 Get the cumbustabilitymug.
Get the cumbustabilitymug. 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
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....
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....
by Sick Man Fraud December 16, 2022
 Get the Cumbustmug.
Get the Cumbustmug. 1. Term referring to a male who busts cum, i.e. likes to suck dix 
2. Gay person
3. Often used as a general insult.
2. Gay person
3. Often used as a general insult.
1. Dude, Steven likes to pants people. What a cumbuster.
2. See that guy in the plaid jacket? He's a cumbuster.
3. DON'T TK ME YOU FUCKING CUMBUSTER.
2. See that guy in the plaid jacket? He's a cumbuster.
3. DON'T TK ME YOU FUCKING CUMBUSTER.
by Grif April 9, 2004
 Get the cumbustermug.
Get the cumbustermug. by RJ3000_ August 16, 2019
 Get the Cumbustmug.
Get the Cumbustmug.