liquid cocaine
This action occurs when one partner is giving the other partner (has to be a male or a very talented female) sexual activity where one person uses their mouth to stimulate the other's genitals. The fallatio process stays pretty much unchanged except right before he, or our very talented females, are about to ejaculate. At this point the penis is put up to the nose of the very generous giver and the ejaculation process is completed. 

Jack and Jill were getting down, Then the stars alined and Jack screamed "I'm about to come" Jill thought she would be a good girlfriend and give him one more slide on the pole. Just as Jill's mouth came off Jack's penis Jack moved forward, propelling his penis into Jill's unexpecting nose and gave her a joy even Tony Montana couldn't create. She had just taken a shot of liquid cocaine.