To masturbate using an OtterPop, or Freezee, depending on locale. Unleashed a torrent of colorful cold pleasure on those who chose to embark upon it's journey.
Chris: Oh man, why are the sheets all rainbow colored?
Alex: Tyler was doing the Wisconsin Otterslop
or
Alex: TYLER! Why were you doing the Wisconsin Otterslop on the bed?
Tyler: It... Felt.... Good?
Alex: Tyler was doing the Wisconsin Otterslop
or
Alex: TYLER! Why were you doing the Wisconsin Otterslop on the bed?
Tyler: It... Felt.... Good?
by Colorful Otter May 1, 2011
Get the Wisconsin Otterslopmug.