When two models or a director/organiser and a model from a fashion show, shoot or other, get it together. This is either in public or behind closed doors. The term Originated in Leeds after a University semi professional fashion show, filled with mo mance, spun out of control and made the local papers.
So did you hear about the Leeds R.A.G. fashion show? Mo mance central.
Man, those two models are so Mo mancing at the moment.
A close friendship between two straight men who share similar interests and views, to the point where their relationship would be mis-interpreted as romantic from the outsider.
When two homosexual people are best friends. It can be two gay guys, or two lesbians, or a lesbian and a gay guy. They are not in a romantic relationship they are just two best friends who both happen to be gay.