Something that occurs after a long night of drinkin with the posse. Best deposited at work, a pubic shitter or a friends house. Never drop a Sewer Missle at home unless you have the extra cash for Rotor-Rooter.
When a man inserts a small object e.g. a marble, into his foreskinand then uses his pressure from the release of urine to propel the small object into a woman's vagina.
Billy says to his friend " I nailed my girlfriendlast night!"
Tommoi replied " How did you do that ?"
Billy answered " I hit her with a Flange-missle."