From shit + flood.
shitflood (plural shitfloods)
- (vulgar, slang) A large amount.
2007 June 22, Richard Henry, “Re: Thanks, freaks”, in rec.skiing.alpine[1] (Usenet):Then you dropped a shitflood of lies, whiny accusations, and obscenities.
2007 July 29, Iconoclast [username], “Re: Border is WIDE open (no fence)”, in alt.politics.immigration[2] (Usenet):One thing it has done it has slowed the shitflood of scum in this area, […]
2008 June 27, corky, “Re: Same six flamers ruin this group”, in alt.seduction.fast[3] (Usenet):The only topic I am responding to is your recent mass shitflood of baseless claims about some unnamed seduction gurus.