Bathtub Sink Effect 

Those times when you use your bathtub to heat your sink. A lot of times when one washes their hands at the sink and turns the water on hot, nothing but cold water comes out of the faucet. By letting the water in the bathtub run for about 10-15 seconds, the water heats up. Then you turn off the water in the bathtub, run your water on hot at the sink, and in a couple of seconds, you have hot water running at the sink.

Normally when the Bathtub Sink Effect is not done, you can run the sink water for minutes and get nothing but cold water even though you have it on hot.

Bathtub Sink Effect by Dancing with Fire December 14, 2010

bathtub warrior 

usually a marine cadet or sea cadet who thinks they're better than everyone else and thinks that they're as good as an actual soldier when in fact they actually just splash around in the water,fall off boats and fail to dry capsize.
basically the equivalent to a puddle pirate but more commando and less sea cadet...

army cadet next to a river: oh look at that bathtub warrior, that twat cant even swim!

bathtub warrior by aircadet101 September 8, 2019

bathtub gin 

liquor made in one's own home (because during prohibition they filled the favored bottles at the bathtub instead of the kitchen sink, can be applied to more than gin)

I wouldn't be caught dead drinking that bathtub gin.

bathtub gin by The Return of Light Joker February 16, 2009

bulldogs in the bathtub 

When a man puts his testicles into someone's asshole.

Her ass was so loose, I could have put my bulldogs in the bathtub.

bulldogs in the bathtub by brooklyn dave September 7, 2006

This Isn't a beach It's a Bathtub 

Literally the most retarded porn video I could find.

yuh, i was watching porn, and the chick says, "I see you don't have a lifeguard for your beach", and the guy in the bathtub goes, "Lady this isn't a beach it's a bathtub!"

This Isn't a beach It's a Bathtub by yuH homie February 18, 2019

Bathtub

1) A place where cute couples can romantically fuck.
2) A place where you can put your whole body in and drown.

Woman: Let's drown together and have sexy times and shit!
Man: Ok.
Woman: Let's get the toaster!
*while fucking*
Man: I'm gonna cum!
*Throws toaster in the bathtub*

Bathtub by Mr. Plats March 5, 2018

bathtub crank 

A street term for poor quality methamphetamine; methamphetamine produced in a bathtub.

Bathtub crank is commonly made in a bathtub.

bathtub crank by moogirlos December 12, 2015