(n.) A event of the penis in which an erection is lost at an unusally rapid speed(often caused by the sight of an unattractive female). Pronounced like "erection" with a "d" in front of it. Opposite of an erection.
I just saw Rosie O'Donnell in a bikini and she gave me a massive DE-RECTION.
The title of Rihanna's first #1 track off of her debut album "Music Of The Sun". 'Pon' is short for 'upon', so the title means 'upon the replay' in other words play the song again.