In internet usage, particularly forum message boards, a user who swarms a post with useless commentary. Not considered a spam
, as the user will usually post as part of a larger group of users, and the said user will usually think their comment is complimentary or in some way helpful, even though it is not.
The comment is:
1) Usually worthless. "OMG, that's great!" is not as complimentary as they poster believes it to be, and only serves to waste the time of the original poster.
2) Not well thought out. The comment is usually quick, and does not justify itself. No reason is given as to why the user feels the way he / she does about said topic, image, story, etc.
3) Part of a mob mentality. Piranhas don't work alone, unlike most spammers. Their posts are usually followed by a swarm of like-minded posts, fueling the useless flood of empty comments.
NOTE: These types of comments are usually most prevelant on a forum centered around skills development. (Art sites, writing boards, game modification boards, etc.) Where a person skilled in whatever the forum centers on is easily attacked by piranhas and his / her post is quickly devoured.
Original Poster: "Hey Guys, I just finished this 1200 DPI artwork, can you give some honest critique so I can improve myself?"
Piranha3083: "OMG! You are my favorite person ever! 111! Have my baby!"
Piranhaman111: "Doood! You have mad skillz! OMFG! 1337!
Prinininsenhna: "ROFLES. SO GOOOOD! I LOVE IT!"
Original Poster: "That doesn't help me at all, that was completely pointless!"