After ejaculating into a woman's ass, she farts and cum drips from her asshole into her vagina. This sperm then joins with the womans egg creating a baby.
Upon having sex with a females anal cavity, and expelling your man juice inside the cavernous hole, the girl is prompted to fart, launching an explosion of semen out of the region.
Apparently texting-speak for "atleast". That is, without any space. If you type in 2853277, because you're too dumb to know 'at least' is two words, the phone apparently suggests 'culdart' to you. This editor uses proper keyboards to communicate, but knows people who actually use this like a real word on myspace and such.