Stepping in a puddle and getting your shoe wet.
In my experience always seemed to happen in the snowy months: Slipping on the snow when jumping across the creek, stepping through the thin ice on the side of a pond, falling through a spring snow bank that has been hollowed out by the thaws runoff.
When a woman gets so incredibly turned on, instead of just getting wet she completely soaks herself in vagina juice.
A cigarette soaked with PCP(angel dust)
Soaker is the act of having inter-coarse to completion. Then leaving the penis inserted into the vagina until morning.
One who participates in the act of soaking. [Soaking]: to place ur penis in a girls vagina, and not move in and out, as if to soak it.
boston terminology for blowjob
* These videos are coming directly from Youtube, they may or may not be most relevant to the word "Soaker"