The act of ejaculating in less than or equal to 20 seconds during a sexual encounter with a girl. Mostly used as a verb; this word provides you with the single most efficient way to describe your letdowns without it being too embarrassing!
John: Man, we were starting to get really hot until I accidentally Talhasened; it was so embarrassing.
Dimitri:Hahaha, it's alright man, all of us have Talhasened once or twice in our lives.
Derek: Don't tell anyone, but I have a little Talhasening problem so we might have to go a bit slow.
Audrey: It's alright; it'll be our little secret!