When you're jacking off to
porn and when the
video stops to buffer you become too impatient for the
video to resume so you just cum during the buffer screen.
"
Dude I was watching this Dillion Harper vid last night on my phone but I only had 4G."
"Oh no, did you buffer nut?"
"Yea. I gotta get better
internet..."
"Sick
dude, let's blow each other."