1 definition by Merry Christmas!

Top Definition
The act of screwing a pregnant chick in a pool, hot tub, or jacuzzi.
"So I hear your girlfriend is pregnant...guess this means you'll be making it rain fishy bathtubs for the next 9 months"
by Merry Christmas! December 23, 2008

Mug icon
Buy a Fishy Bathtub mug!