A line, made up of vaginal or anal secretions, left on a penis, indicating the maximum depth that said penis was able to penetrate the orifice. Also known as a high tide mark.
Did you see that one scene with Tori Black taking Mandingo's bbc?! She left a mean high water mark on his junk. He was barely half way in her when he bottomed out.
by yoube6ibe9 February 19, 2018
Get the High Water Markmug. 
Get the High watermug.