Sleven or S'leven is a slang abbreviation for the combined words of "7 Eleven", referencing the popular convenience store found nationwide. The two syllables of Sleven saves time over the five syllables it would take to identify the proper name.
The flow of saliva from ones mouth down the chin. Can be seen at its best when a slack jawed yokel stands gawping at something the desire...and a dribble of saliva runs from the mouth and falls off the chin..