Person that although awesome in its core, is very unreliable, disappointing at times, has a lack of presence, effort and/or fulfillment from his part in relationships.
'Vanquish' means to be a genius. It can be used to describe a "noob" or a "hacker" in counter-strike. 'Vanquish' also means that girls follow you around everywhere.
OMG! All you get are headshots! What a vanquish!
Man I have like 20 girlfriends. I am so vanquish.
A sexual manoevure where a man is performing anal sex on a woman in front of a window and another man is standing outside the window. The first man takes his penis out of the woman's anus, pretending to take a break and jumps out of the window, allowing the second man to step in and continue the sex.