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1.
1)A person who is likes an EXTREMELY LARGE amount of semen for the pleasure of getting cock all the time.

2) Or a girl you want to have sexual relations with to the extent that you coat her in a thick layer of semen.
1) Dude I hope you choke on some guys dick you Jizz Rooster

2)That girl is so hot I am going to make her my Jizz Rooster tonight.
by Domo M3 November 07, 2011