Dick that only comes around once a year.

A dick you get only on vacation.
Its usually a very nice one.

A penis that is very large to the point it hurts. It is a penis that you wouldn't want to take on a daily basis.

A dick that is too small or too large to recieve on a daily basis as opposed to the desired size of a boyfriend dick.

boyfriend dick

A dick that sends you to a nice vacation in the Bahamas. You ride it so hard, it sends you to the tropics.

Once in a life time dick. Either too small or too big it's a trip.

A penis that is great to recieve occasionally but not worthy of regularly. Normally larger than your average sized penis. This penis is usually AMAZING, too amazing that if revieved daily it would lose its touch.