It means absolutely nothing. Its just something people say when they are bored or have nothing to do.
by superHotchIck June 8, 2015
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From Wikipedia:

Bloop or The Bloop is a mysterious ultra-low and extremely powerful underwater frequency detected by the U.S. National Oceanic and Atmospheric Administration (NOAA) in 1997. The source of the sound remains unknown.

The sound, traced to somewhere around 50° S 100° W (a remote point in the south Pacific Ocean west of the southern tip of South America), was detected several times by the Equatorial Pacific Ocean autonomous hydrophone array. This system was developed as an autonomous array of hydrophones that could be deployed in any oceanographic region to monitor specific phenomena. It is primarily used to monitor undersea seismicity, ice noise, and marine mammal population and migration. This is a stand alone system designed and built by NOAA's Pacific Marine Environmental Laboratory (PMEL) to augment the U.S. Navy SOund SUrveillance System (SOSUS), equipment originally designed to detect Soviet submarines.
TL;DR: The Bloop is a shit-pants sound coming from the bottom of the fucking ocean. The sound went across the entire South Pacific and was picked up by underwater recorders placed pretty much all around the ocean. To make matters even creepier, it is louder than any underwater creature ever recorded. Multiple sounds were recorded around the same year which were dubbed Whistle, Train, Slow Down, Julia, and Upsweep.

And yet another thing that makes Bloop even fucking scarier is the fact that the sounds were at a special frequency that shows that these were in-fact made by living things at the very bottom of the ocean. And in the H.P. Lovecraft (the guy that wrote about things like Shoggoth, Cthuluhu, and others) books, it states that the place where Cthuluhu sleeps is located almost exactly where The Bloop was traced. What the unholy fuck. Not to mention Lovecraft died 60 years before these sounds were ever recorded.

I played The Bloop when my cat was in the room and my cat went fucking apeshit. I'm not kidding.
by Mister Cookie October 30, 2012
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a noise a wild miso makes.
Person: bloop
Response: bloop
by misocomplex January 24, 2019
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To bloop (verb); the act of blooping; To place something(item/drug/or anything else) in one's sphincter(see butthole).
It is very popular for people in the rave scene to bloop their Molly; Blooping is very common among people who have high tolerances to whatever drug they are taking; We blooping mayne!; Do not go blooping your food, Johnny, because your asshole has no taste buds.; Most drugs are absorbed more efficiently through blooping rather than eating, snorting, or smoking and is safer than using a needle.
by An0m0t0p3A September 6, 2013
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Bloop is a phrase used as an reaction when someone hears tea, shade, and information that was not known at first. In addition it's an reaction to an action that is usually an incident. Can be seen used for comedic effect or from genuine confusion.
Group of friends - Jessica, J.P., Kay'lla, Veronica
Jessica: Yeah me and J.P. are the best of friends

J.P. : Ummmm Kay'lla is my best friend last time I checked Jessica
Kay'lla: Up bloop
Veronica: bloop bloop

Example 2- Group of friends are walking to The Pit (Nick, J.P., Q, Jackie)

Nick: Aye we should cross the street right here
Q: Ight

J.P. : Aye yo y'all see that old lady with those high water pants and no edges crossing the street tho?

Jackie: *laughing uncontrollably*
Old Lady: *Trips and lands on her knee caps*
Nick: Up bloop
J.P.: bloop bloop
by BloopJames September 24, 2017
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The act of sticking your finger just below a lady's boob, yelling "BLOOP" and flicking it up so the breast flops and jiggles. Every bloop has a different effect.
Omg haha that bloop was so violent, she must not be wearing a bra!
by katebears1212 February 27, 2011
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Dan's name for fire flies when he's drunk or high
"Woah, look, look, see right there bloop bloops"
by dl33t June 9, 2004
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