To successfully take advantage of someone sexually, usually without direct invitation. Often the victim is higher up the hotness scale then the perpetrator.
More often than not the perpetrators are female and in most cases the victim is too indifferent, drunk or polite to put a stop to it.
'I got totally dolaned by this fat chick last night'
'My mum's best friend tried to dolan me last night but I managed to resist'
'I'm waiting until that cute guy gets drunk tonight, then I'm going to dolan his sweet ass.'