When you grow up in a trailer park and are permanently attracted to trashy chicks. No amount of social mobility or class elevation can change the intense attraction to trashy chicks. The term is derived from the rapper Eminem, who grew up in a trailer park. Even once famous, he still banged and sought out trashy chicks. There is no known cure.
Jim: Duuuude! Check out that chick over there, 8/10!
Bri: The one with the skunk hair and tramp stamp???
Jim: Yeah!
Bri: Uhhhh, she's like a 5....
Jim: My Eminitis must be dickin' up again....
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.