A figure of speech which implies that something which has no pornographic content in the slightest is so extremely amazing or extremely shameful that one would say it would be better to be caught watching porn than that.
I was watching the Rebecca Black video and suddenly my mom walked in so I switched to porn.

This dubstep song was so dirty, I was switching to porn every time someone passed by.
by Nacatac April 25, 2011
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A joke often used in the YouTube comments section, in which someone says "I switched to porn when my mom walked in, it's easier to explain."
People who use this joke think they are calling the video weird in a funny or original way, when in reality it's been plastered all over YouTube thousands of times. Someone who says this is often referred to as a faggot.
Person A: "Lol, this video is so weird I switched to porn when my mom walked in, it's easier to explain!"
Person B: "This joke has been viewed thousands of times and as such has been rendered completely humorless. I imagine even the dumbass that came up with the joke is weeping right now."
by Cleffroski January 25, 2015
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