When you want to call a girl a slag - in the sense that they are contemptible or insignificant - but political correctness kicks in, so instead you call them a lightweight tormentor.
"I refuse to call today's bully a slag, because that would not be politically correct. Instead I will only call her a lightweight tormentor!"
by Masterspy November 07, 2017
by Ang31rockz July 31, 2015
by Samquiet April 10, 2016
by abi d yessaaaa November 08, 2020
Someone that freaks out or has adverse effects that other people around them don't have on a light amount of a drink or substance (not just once but always, something they're known for) is about as close you get to what somebody means when they say somebody is a lightweight. So a guy drinking a quart of wine and not being able to stand up is not a lightweight, because most people shouldn't have good balance after drinking a quart of wine.
The lightweight is falling all over the place or making a chaotic environment every time he/she has a couple shots or beers, or hits of a joint.
by The Original Agahnim June 17, 2021
The girl that thought she was Chyna, the pro wrestler, the one blocking the stairway and loudly asking everyone that wasn't out there with her what the hell is going on wasn't doing anything physically clumsy, but was still making the same kind of chaotic environment that somebody would make if they were stumbling around. Not everybody gets that way after a few drinks, so she must be a lightweight.
by The Original Agahnim June 17, 2021