Often said to a male when he is either complaining about something inane or performing a manly action poorly. It insinuates that he is female, he is menstruating, and that he placed the sanitary napkin to catch the flow with the sticky side towards his genitalia. This causes obvious pain, which leads to both anger and poorer performance all around. Ask any woman over the age of 13 who has used pads. She'll know.
(At shooting range) "Dude, you couldn't hit the broad side of a barn!" "Shaddup, it's the sights are off!" "Whatever, man, sticky side out."