1)Feeling horny and the intention to seduce many females/males when already in a relationship.
2)Having thoughts of a playboy.
3)Addiction of needing a sexual partner.
Oh my gosh! I guess im having igi-ness!
Dude, you already got more than one chicks, stop the igi-ness.
Wow! I need more than one chick, dude!
Im really having the igi-ness fever!