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8.
a green creature that is in the halo serious in the first halo they were given nick names like keligion, pimples, and walking zits.
The flood are coming!!
by Anthony Quintero-Castañeda March 06, 2005
 
9.
that time of the month
ohhhh no the flood, dont bleed on me!
by dr. CHAOS October 18, 2003
 
10.
the flood is a series of creatures sent to scare and eat anything in its presence, and take take over human bodies but not covenant. Very ugly creatures with tentacles for arms and whip you in the face.
Ohhh shit! The zombie things are here. No shithead!!! that is the flood.
by MicPeps June 22, 2004