A "Mech-Warrior" is any woman (or man) who wears high heeled shoes, is chubby and has big boobs that stand out like flak cannons although she (or he) is incable of properly walking in them. Mech-warriors are characterized by their awkward posture and halting gait while walking, like the giant robots in (no-Japanese) robot fighting games. A mech-warrior can be futher defined if the woman has a pronounced hunch in her back caused by the poor posure her high heeled shoes promotes (see "hunchback")
Almost anybody who pilots a BattleMech. There are a some n00bs out there who think they are Mechwarriors, but they ain't! They wind up smok'n wrecks not long out of the spawn. It takes a real Mechwarrior to take down a 100 ton Dashi with a 45 ton Shaddowcat.
MechWarrior is a Sci Fi fictional universe and Series of novels, board games and video games based off of the 1980s FASA Corporation Battletech. MechWarrior and Battletech is literally the Same Thing.
Did you hear about The new MechWarrior Table top Game coming out?