One who is very pro-older men/women of the same gender, often tend to do everything in their power to cover up said relationships. Primary occurrence with said elder is generally a teacher-pupil relationship after the formality of the classroom has been breached.
Yo dude, that guy is Mevvin' (Mevissen) it up over there! He's mackin on his old math teacher good!
Someone who dates older men and is in denial. Generally they hide the relationship from their parents and it is usually a high school teacher-student relationship.
Wow, Eric is a real Mevissen, he just went on a another date with that 29 year old guy.