LOL My Lynx and Privateer is my primary hunting ships, and they dont have chasers. But I wont fight a "fair" fight if I can help it.
Even if I am out in my Snow I wont fight a fair fight, I will seek every advantage I can get before the fight to assure victory. But I guess my BR 50 Snow with chasers is a gank ship... even though all I have sank has been LGVs, Navy Brigs, and other Snows. But I guess because everything that thing has sunk has been bigger BR or equal to mine I am a gank ship.
The problem @Simon Cadete isnt ganks, it is the person who is getting "ganked". If you sail alone in a lumbering target and you cant operate it in a manner that you can defend yourself, then you are going to be an easy target for a hunting group. Or a "gank party" as you call it.
And a gank is when you jump a completely defenseless prey who has no chance at defending themself with such an overwhelming assault that it is over before they knew it began.
Example, a Santisma joining a battle right next to a Trader Snow and unloading all 56gun broadside into it before the Snow can even raise sails. That is a gank.
Gank came from getting gakked, which was the sound most characters made in old MMOs when they died quickly. The other possible origin is from shortening the term "gang rape" to ganked. Not sure how it worked.. but it did.
The current term is... you got WREKT or rekt for short.