A portmanteau of "happening" and "fap", the latter of which in turn is an onomatopoeia for masturbation. Popularized by the 2014 celebrity pictures hacking scandal, or "Celebgate".

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 someone or something is so attractive that you would add them or it to your spank bank and or start “fapping” on the spot.

an event that occurs when someone on the internet releases a large amount of fappable or nude/semi-nude pictures of famous people.

Verb and noun
1. Used to describe the moment you see a girl's nudie pic, prompting you to do the knuckle shuffle

When a bunch of people start fapping out of no where.