The act of performing
manual sex (fingering), underwater. If parties involved are truly disgusting, and unaware of health
hazards to themselves and others, possibly in a public place, like at the pool. Also known as Sub-Aqua
Manual Sex (or SAMS to veterans of the Underwater-Erotic world.) Any person who has performed this feat eight or more times is known as "An Octopus" and often revered as somewhat of a disgusting legend.
Lad 1: Dude! I'm off to do some
fish fingering down at the
Lido.
Lad 2: Wow really? How many times is this now?
Lad 1:
This'll be my 8th.
Lad 2: Oh my god man! You're gonna be an octopus!
Lad 1: Yeah but last time her hidden wreck was barnacle encrusted and covered in seaweed...
Both: *shudders*