The act of touching oneself to produce a favorable feeling in the groin area. Usually accompanied by some sort of mental, visual, or audio stimulation to assist in reaching climax.
jerking off; spit-shining the old water pump; waxing the brass candlestick; beating off; playing cards with only one hand on the table; riding the quarter-horse; joining the mile-high club, solo-aviator division; giving in to the hand police; self-actualization; fully realizing your potential
No honey, I don't want to tonight, I'm tired from watching Oprah. Why don't you just go masturbate?