1) The coming togather of man and woman.
2) A crappy scenario in which somebody does something to hurt you thinking they're funny, that can only be emphasized by a random assortment of swear words.
1) 'your boobs look nice love, i'd like to mingewank you'
2) 'ouch that hurt, your such a mingewank'
This word is usualy used in sientiffic small talk when talking aboat genetics, evolution, demographycs, biogeography or anywhere where things get mixed up and confused.