HBO-Tard is a combination of the words "HBO" and "Retard.", sometimes also referred to as a HBO-Believer or HBO-Enjoyer.

The original definition referred to someone who believes HBO's miniseries on Chernobyl; however, that has been expanded and now refers to people who believe blatantly obvious and easily debunked things originating from various sources, including but not limited to HBO Chernobyl, Zero Hour Chernobyl, and other Chernobyl media.

HBO-Tard can also refer to an extremely uneducated (but not necessarily misinformed) individual on matters related to Chernobyl and RBMKs, typically someone who actively denies facts despite being presented with overwhelming evidence contradicting them.

Examples of misinformation that HBO-Tards commonly believe include, but are not limited to:

- Believing the reactor lid's caps (AKA The Rod Caps) jumped up and down before Chernobyl-4 exploded.
- Believing Aleksander Akimov pressed the AZ-5 button.
- Believing Anatoly Dyatlov was a moron who violated safety procedures.
- Believing that the power surge happened prior to AZ-5 being triggered by Toptunov.
(Note: power did increase slightly but it went back down again after)
No way this guy thinks that the rod caps jumped, what a fucking HBO-Tard!
by Thxtnt June 28, 2023
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When a craptastic movie becomes more enjoyable after watching it over and over again on HBO or any other pay cable station.
"I really thought Couples Retreat sucked in the theater, but strangely, thanks to the HBO Effect, I've actually come to like it after watching it 45 times on HBO"
by Ondine1927 September 1, 2011
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A particular kind of civilian love-making in the graphic/raunchy/loud manner we as viewers expect from such HBO shows as THE SOPRANOS, TELL ME YOU LOVE ME, THE WIRE and sometimes BIG LOVE.
BILLY: Hey, Susie, you sure are walking funny today.
SUSIE: You ain't whistling dixie, Billy. Me and that guy I met at Hyde totally had HBO Sex last night. I can barely sit down.
BILLY: Damn, you sure look it.
by HelenHar April 24, 2008
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For those rich elite turds who aren't content with merely netflix and chill, but rather they can somehow afford to pay over 15 dollars to have an HBO GO account. HBO and chill is for the snobby folk such as CEOs and Hedge Fund Managers. HBO and chill can be much cheaper during an HBO and chill orgy, where multiple perform sexual acts while sharing a single HBO GO account.
Eric: "I feel like we can take this relationship to the next step... wanna come netflix and chill?"
Ashley: "You uncultured swine. I only hbo and chill. I'm not a fucking whore Eric."
by agletman2 November 14, 2015
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Getting a blowjob with HBO in the background
Nick: "Hey Rachel want to come over and watch HBO?"
Rachel: "Only if you have a big dick"
Nick: "What? We're watching HBO.."
Rachel"It's HBO GO and Blow so I'm giving you a blowjob"
by Jellyfishing October 5, 2015
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When kids learn about sex by stumbling onto a porno, could be either a late night TV movie or finding something on the Internet
John never got a "birds and the bees" talk from his parents, he learned everything he knows about sex from the HBO sex talk.
by Charlie043985 April 1, 2011
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