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(n.) (orig. South African English) A person who can repeatedly takes completely innocuous phrases or words and make them into a sexual or lewd statements. Often followed by an "Oh yeah!", "Fuck yeah!", or a high five :)
Person A: "Do you like Sex and the City?"
Person B: "Sure, it's a pretty good show!"
Pornstart: "She didn't mean the tv show..."

Person: "You were walking in a forest and came across a troll..."
Pornstart: "Lol, did you wipe it off afterwards?"

In joke
Person A: "Yeeeeeeeeeeeeeeeeeeeeeeeep!"
Person B: "Yeeeeeeeeeeeeeeeeeeeeeeeeeeeeeep!"
Uncomfortable Person C: "Omfg, u guys should stop being pornstarts and just go get it on already..."
by Hedgehog69 March 26, 2013
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To begin watching pornography with the endorsement of their partner who will conduct and/or take part in physical, sexual activity.
You wanna pornstart tonight?
by Sabbygina March 10, 2015
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