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1.
The noise that can be, but isn't guaranteed to be generated by the penis and breasts during rough pelvic thrusts by the male and tightly squeezed breasts usually helped by sweat, lube, or spit. Usually no foul smell results from this.
I was titty fucking my girl and we were really going at it and then she titty farted on my dick.

My wife can titty fart on command.
by traynwreck February 14, 2012
 
2.
where the titty is wet and gets slaped with the other to create a tittyfart.
dude, your mom had the biggest tittyfart ever lastnight.
by Ian February 25, 2005