The act of having a someone pour 2% milk into their mouth, adding a teaspoon of nesquik, and then proceeding to slowly dip your genitals into their full mouth.
Ally was craving chocolate milk and I was horny so we met in the middle and she agreed to an Ohio Bird Bath.
A bird bath is when someone walks in on you masturbating, forcing you to quickly stick your member back in your pants as you blow your load, leaving a sticky mess all over your "Bird".
Fuck dude, you made me give myself a bird bath when you walked in on me earlier.
The act of shitting in a urinal
Hey Depo, all the stalls were full so I had to bird bath the urinal.
Washing your penis in the sink.
Kevin: Yeah, I was tryna get a blowjob so I went and took a bird bath.
When you pull out during sex and your cum fills up their belly button.
"She wasn't best impressed when I 'Bird Bathed' her last night."
When your partner, takes a steaming dump on your face, and you smear and wear it like a mask to exfoliate the skin.
"Rachel gave me a himalayan Mud bath last night, now my cheeks are softer than a babys bottom"
When you eat so much spinach that your cum comes out as green as aloe!
I ate so much spinach dip that I aloe bathed her after duffys.