Definitely the original word to the shortened word that is defined on the site as forgays. Forgaisey is pronounced with the extra "e" sound at the end and can be heard in some Jay-Z lyrics. It basically is used to describe something thats wack or someone that does something madd retarded or is just plain acting up.
guy- Yo, i thought this party was gonna be poppin but this shit is wack.
guy- Yeah there aint no bitches here. Shit is forgaisey.
friend- Yo I almost blew your spot up about that hoe from the club when I was talkin to your girl!
friend- You're fuckin forgaisey.