Any discourse between two or more men involving the heartfelt discussions of feelings e.g. typically conversations traditionally thought to be the domain of women involving feelings about relationships etc.
First usage came in Autumn 2009, after a contentious self-help group began at Oxford University named Man collective Oxford founded by Alex Linsley, Merton college.
It was renowned with the infamous opening quotation 'Do you have balls? If so, how does it make you feel to be a man?'
Man 1: 'I've been having some strong feelings lately and have some personal issues that I need to discuss'
Man 2: 'Ok, l think it's time we have a man collective.'