When you forget someone's name while you are introducing them to someone else so you can figure out what the other person's name is, since you've forgotten that too.

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.

The inability to remember anyone's name.