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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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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Person A : Creeper
Person B : AWWWWWWWWWWWW MAN
Person C : 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
Heads up, you hear a sound, turn around and look up, total shock fills your body,
Oh no it's you again,
I could never forget those eyes, eyes, eyes,
Eyes, eyes, eyes
'Cause baby tonight, the creeper's trying to steal all our stuff again,
'Cause baby tonight, you grab your pick, shovel and bolt again,
And run, run until it's done, done, until the sun comes up in the morn'
'Cause baby tonight, the creeper's trying to steal all our stuff again
Just when you think you're safe, overhear some hissing from right behind,
Right, right behind
That's a nice life you have, shame it's gotta end at this time, time, time,
Time, time, time, time
Blows up, then your health bar drops, you could use a 1-up, get inside don't be tardy,
So now you're stuck in there, half a heart is left but don't die, die, die
Die, die, die, die
'Cause baby tonight, the creeper's trying to steal all your stuff again,
'Cause baby tonight, you grab your pick, shovel and bolt again,
And run, run until it's done, done, until the sun comes up in the morn'
'Cause baby tonight, the creeper's trying to steal all your stuff again,
Creepers, you're mine
by FeetusDe1etus May 22, 2019
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A strain of marijuana that circulated for some time during the mid 1980's. Generally thought to have been hydroponically grown, it was so-called because of its tendency to not produce large headrushes during the act of smoking, the high instead "creeping" up on you 10-15 minutes later. Sometimes referred to as "creeperweed."
I just bought a nickel bag of creeper, dude!
by Craig 119281 November 3, 2005
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A green hostile mob that has the ability of charging toward it's opponent and blowing up in your face or could instantly kill you depending on level of the minecraft game.
Creeper: SSSS---Boom!

Person 1: What the fuck was that?!

Dead Person 2: Creeper got me and I was so close to the treasure!!!
by Grimoar May 2, 2011
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A green four-legged creature who's insides are wired explosives. It stalks you, making no sound of its movement except the crunch of grass behind you until you turn to face the green monstrosity of which flashes white and ssSS's UNTIL- Boom. Then you lose your diamond pickaxe and respawn far from your location and slaughter millions of them in rage only to realize that.... It just wanted a hug.
Jimmy:HOLY ****! 3 DIAMOND ORE! -is beside lava-background creeper: sssssSSSSSSS.....
Jimmy:FFFUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU-
-explosion-
Jimmy: watches the spinning mini-block diamonds as they are engulfed by the lava in a fiery inferno, respawns and jumps off 4 story roof-
by trickyboy21 August 3, 2011
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