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1.
The feeling of having aged semen flow out of your penis whilst urinating.

Most common for males, it's believed to be caused by slight back flow of semen in the urethra.
"Aww man I just pissed out a squitty scoob"
"Wow dude, how did it feel man?"
"Like a tingly sensation running down the middle of my urethra"
by Dr. Love-Good. October 24, 2013