Submit only the original source of the content. So what part of long hair, a Portal tank top, lace underwear, Portal-themed knee socks and a plush Wheatley makes this a "Chell cosplay", sexy or otherwise? If you're a guy and you want to dress as Chun Li, whatever. Submit a new text post. Welcome to Reddit, the front page of the internet.
Just because it was posted as cosplay doesn't mean it was intended as cosplay.
Relevance Chell Gifs
If it hasn't shown up after more than 5 minutes, simply message the moderators and ask us to look into it. Damn kids these, days, just throw a pair of fuggin socks on it and call it cosplay rasmaphrasmdarnkids. No bandwagon or direct reply posts. But the OP does. You're right to put in on there. The negative consequences for tagging a post that's on the fence are minimal compared to getting someone at work in trouble.