A jamiemaciver is a person(usually male) who is admired by all diferent people. He is mostly admired for his/her skills in the bedroom, having sex. Well known people commonly named a jamiemaciver are porn stars but a jamiemaciver is a person who isn't ugly, fat, gay, stinky or stupid person. They can also be reffered as a hammy or a jam jam.
Aimee: Oh that guys a real jamiemaciver.
Bobby: Yes he is, everyone says hes amazing in bed.
Aimee: He is not fat, stinky, gay or anything!