A boosty fart. Tramabombs most often occur when excessive amounts of semen build up on the boosty during sexual intercourse.
On rare occasions a tramabomb can occur if the woman creature hasn't washed their boosty for a number of days. A noticeable sign that your boosty needs cleaning is a cheese-like smell coming from it. This cheese smell comes from the residue build up on the boosty. If you want to decrease the chances of a natural tramabomb occuring it is recommended that you limit the intake of foods with large amounts of fatty acids.
Scientists are still researching the phenomena behind a natural tramabomb.
Anorexic Jenny: What's the matter, Patty?
Pig Patty (sobbing): All the kids started pointing and laughing at me! Some even came up to me and poked at my boosty with their pencils!
Anorexic Jenny: That's terrible, Patty! Why would they do something like that?
Pig Patty: Well, I felt a tickle on my boosty and knew a tramabomb was on it's way. I let out a fake cough to try to hide the noise but everybody heard it! This is horrible!
Anorexic Jenny: Oh, don't be so down. Here, have a sip of my bologna malt. That should cheer you up!
I was just sittin' in class just chillin'. All a sudden I heards a loud tramabomb! Mayne, what that boosty bitch been eatin'?