Arkansas birth control 

An agressive sexual act in which a man and woman are partaking in sexual-intercourse (works best when female is riding male in a 'reverse cowgirl' position) and the woman, sensing that her male partner is close to ejaculation, will strike the male in the testicles with a forceful blow causing them to recede into the body as a defense mechanism and also causing the penis to shrink thus ruining the sensation of orgasm if it even happens at all...
(Usually used as a revenge tactic for the 'dirty sanchez', 'donkey punch', or 'broken hearing aid')

Last night my man was giving me shit about my ass jiggling too much during sex, so I used some 'Arkansas birth control' and ended the night with a bowl of ice-cream.

Arkansas birth control by p1zl3 January 3, 2007