It's a group of words used as "troll donations" when streamers in Twitch have their donations spoken out loud by Google Translate. So whenever someone donates with the message "gabe horn", the donation system tells Google Translate to speak it out loud, and when spoken, it sounds like "gay porn".
Donation: "gabe horn gabe horn gabe horn" (spoken by Google translate)
Streamer: Why is my donation system saying "gay porn"?
Streamer: Why is my donation system saying "gay porn"?
by MaxZ26 January 5, 2015