The Collaborative International Dictionary
Flooder
Flooder \Flood"er\, n. One who floods anything.
Wiktionary
flooder
n. (context internet slang English) A person who floods message boards, chat rooms etc. with unwanted or repetitive comments.
Usage examples of "flooder".
But on the Tuesday, Wednesday, and Thursday of that week Maggie quite redeemed her character of being a Flooder, and worked under Polly with such goodwill that, as she herself expressed it, her small brains began to grow.