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15.
Someone who is an absolute plug, lazy, annoying, or who chirps excessively. They try to act tough but they are really just an aspiring girl scout.
Brian: Yo you seen that new kid?
Johnny: haha that kids a straight rooster.

michael: hey buddy sweet shot
Cam: yeah the bench is over there ya rooster
by timmy turner99 June 07, 2014
 
16.
(Slang): A pimp.
That guy is such a rooster. Look at all his chicks!
by Accordion December 11, 2010
 
17.
the female version of a bromance
romance + sister = rooster
"Have you seen those two lately?" "Yeah, they've got a real bromance going on." "Nah, they're girls. For them it's called a rooster."
by quesocheeseeee December 21, 2012
 
18.
A slut!
She is such a rooster! Cock-a-doodle doo any cock will do!
by DJ DCL December 31, 2009
 
19.
Someone who is know to have a large penis and uses it to seduce women. Although his greatest physical trait is his penis he is always more intersted in getting money by any {OG} means nessacary
Dino "Dude nick is such a rooster. He slept with three girls last week and is still out {grinding}."
Doug "That rooster is such an {OG}."
by roostersaurus rex October 29, 2008
 
20.
A girl who is quite promiscuous, that is sleeps around a lot. Originated from the fact that for this girl, 'any cock will do'

of course, cock being not the chicken kind, but the male genitals.
Matt: That girl is hot!

Brendan: Yeh, but she's a real rooster.
by stub004 July 06, 2004
 
21.
A drum major of a marching band, a band leader.
The rest of the band members followed the rooster in uniform as they marched the parade.
by Floot January 20, 2012