A green exploding penis shape monster from the video game minecraft.
Steve: Hell yeah I found my self some Diamond!

Creeper: Thats very Ni-ssssSSSSSsss

Steve: FFFFUUUUUUUU-

*EXPLOSION*
by K66guns0 July 17, 2011
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Creepers are hostile mobs that makes use of a suicide-style attack: It approaches players and then explodes, causing damage to players as well as surrounding blocks and entities. Creepers spawn in the overworld at night, and in locations with a light level of 7 or less, just like most other hostile mobs; however, unlike Zombies and Skeletons, Creepers will not catch fire in direct sunlight, and those spawned in darkness will nevertheless continue wandering and attacking throughout the day in any physically accessible area until they are killed or despawn.
Creepers are especially dangerous mobs due to their near-silent approach, save for light footsteps and a signature 'burning fuse' hissing noise that often signifies it's already too late. Their explosion is devastating at short range, to both entities and structures.
Creepers run from cats and ocelots, and will even ignore the player to run away when a feline is too close. As cats can be acquired and controlled by the player, this provides an important avenue of defense from Creeper attacks.
Creepers have gained notoriety and infamy among Minecraft players for their infuriating habit of sneaking up on the Player to inflict devastating damage following an all-too-short warning sound. They have arguably become the most recognizable image from Minecraft, as well as the game's unofficial mascot.

You can find this in the Minecraft wiki Article
Edward: ugh... I hate how a Creeper suddenly explodes in your face.

Logan: Yeah, that sucks.
by MinecraftInformer August 5, 2013
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A green penis like creature in the video game Minecraft that gains pleasure out of destroying hours worth of building by self destructing. Before it explodes it let's out a "sssssSSS" noise that resembles a fuse being lit.

In other words if you hear "ssssSSS" Run like fuck.
Creeper: "That'sss a nice houssssse you got there. It would be a sssssshame if something happened to it. ssssssssssSSSSSS

*BOOOOM!!!*
by Smuglorda July 3, 2011
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Generally, someone who is a semi-nice person but is completely and totally socially awkward who tend to try to say something nice or complementary that comes off sounding perverted.
Say there's a dress code at some school:

Larry: Hey, Marge. The buttons on your shirt are unbuttoned too low.

Marge: Oh..kay. Thanks, Larry. **Creeper**
by Odd.Little.Devil July 16, 2009
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Awww man,
So we back in the mine, got our pick axe swinging from side to side,
Side, side to side
This task a grueling one, hope to find some diamonds tonight, night, night
Diamonds tonight
Dylan: Creeper
Brayden: Awwww man,
So we back in the mine, got our pick axe swinging from side to side,
Side, side to side
This task a grueling one, hope to find some diamonds tonight, night, night
Diamonds tonight
by Bxalk July 29, 2019
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