Any child who has grown up with a parent in the Extension Service, knows what MSU means, got excited when you turned 9 because you get to finally be a real 4-H'er, personally knows 10 or more Extension Agents- or has memorized who serves what county, tried to name every county and county seat in the state, and has played "Name That Noxious Weed" on many a road trip.
A naturally occuring phenomenon of an erect penis growing beyond its standard capacity. This rare occurence happens usually after hours of intense sexual intercourse.
This is generally not a problem unless your partner is very petite.
A seven-inch erection becomes eight inches. An eight-inch erection becomes nine inches, and so on.
Sentence: Mr. Smith experienced an over extension of his penis while he pulverized his slam pig last night.