Never seen it but I knew of the nod to the film, in fact according to Wiki there are quite a few:
There are numerous "cameo appearances" where the phrase is sneaked in — without any context — to pay homage to the original film.
Approximately 26 minutes into the 1982 film Tron, the words are seen posted on a sign hanging in Alan Bradley's cubicle.[14]
In the film Star Wars Episode VI: Return of the Jedi, two of Jabba the Hutt's skiff guards reference this phrase: one guard is an alien of the Nikto species named Klaatu, and another is an alien of the Klatooinian species, named Barada.[15]
The phrase also appears in an Easter egg of the web browser Mozilla Firefox 3 (as well as some other browsers using Mozilla's Gecko layout engine), as the title of the page about:robots.
Alice Cooper utters the words at the end of the song "My Stars" from his 1972 album School's Out.
In the 1999 film Galaxy Quest the aliens (Thermians) are from the Klaatu nebula.
In David Ives' one act play entitled The Universal Language, one of the characters utters the phrase, "klahtoo bodami nikto." Translated from the play's fictional language Unamunda, the phrase means, "you are bother me not at all." Given that the language is filled with pop culture references, this is most likely a nod to The Day the Earth Stood Still.
In 2000's The Flintstones in Viva Rock Vegas: The great gazoo says "Klaatu barada nikto" just after he crashes into Earth
In an episode of Two and a Half Men, Alan while sleepwalking, mutters the phrase to Charlie as he ushers him back to bed.
One of the Monkees says it in episode 49 of the second season, "The Monkees Watch Their Feet."
The phrase was used by Commander John Crichton in the T.V. series Farscape, in the season 4 episode "I Shrink Therefore I Am".[16]
Siri, a voice recognition software application developed by Apple, Inc., that serves as a virtual assistant in the company's iPhone 4S product, recognizes the phrase and responds with one of the following outputs:
"You know that just means 'make me a peanut butter and jelly sandwich,' right?"
"The decision rests with you, Earthling."
"I believe Klaatu left the planet somewhere around 1951."
"Is that you, Mr. Carpenter?"
"Okay [username], I'll pass the message on to Gort."
In the 3D real-time strategy game Sacrifice a player's wizard may speak the words "klaatu", "barada" and "nikto" when casting a spell.
Jovem Nerd, a brazilian website, used the names 'Klaatu barada nikto' in a RPG podcast, which are the names of three bosses that the characters had to fight.
