After doing anal, cum over her butthole and let the cum flow in her butthole. The scenery will give you the memories of Niagara Falls.
by DepressedRetarded May 31, 2017

The unfortunate effect of excessive heat on male genitalia resulting in an insane amount of perspiration in the testicular region.
I was going to go to the carnival last night, but it was so hot out I got niagara balls as soon as i walked outside.
by SuddenlySilly November 13, 2011

Yoooooo this is the thing that happens when you do a 24 hour stream and you need to pee and you cant spot at all
by Hates everybody January 3, 2019
