The act of having Sexual relations with a women, while unbeknownst to you and beknownst to her(because she doesn't tell you but she had to have known), she is currently menstruating. While hooking up with said female, you somehow come into contact with her "special area" and signs of contact can be seen by everyone.

Mercury retrograde is the act of taking a shit whilst mooning one or more human beings. Your day can typically being going well, according to your horoscope, until you are forced into witnessing Mercury retrograde. Performing Mercury retrograde will often speed the astrological cycle forward for the individual performing the Mercury retrograde, bringing about happy and fruitful times to come.

when a another guy comes over to the bar and steals the girl you were chatting up (scottish term)

When an individual can achieve a goal on their own, but you assist them regardless of the obvious negative consequences.

(v) Not making your lady friend breakfast after a one-night stand.

To be touched inappropriately while one is passed out from drugs and/or alcohol.