When a man has an erection and discretely hides it by pulling a
"Matrix." This move consists of the classic Neo backwards arch while a hand of preference slides into one's pants and flips the erect penis upwards into its natural position. The penis is then trapped between one's stomach and the elastic band from underwear.
The breezy at the strip club gave be a hard on. I slyly pulled a matrix before she even had a chance to notice.