pleasing yourself infront of the mirror (sexually) often for the benefit of yourself and sometimes others. people have the incentive to carry out a mirror wank because they find themself aesthetically pleasing. however it is advised not to do this infront of crazy mirrors as this could cause a false sense of confidence or a feeling of belittlement depending on the convexity of the mirror.
'hey bro, i just had an awesome mirror wank'
by joshco95 November 11, 2013