I didn't even notice that she had fucked most of the guys at work. She is very slutle.

Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak

In a bar, a girl is sitting on a chair, a guy looks over at her and she pulls up her skirt.

Someone would say...

"that girl just pulled up her skirt so slutily."

or... if the action is clearly not subtle and and you want to be sarcastic then you might say....
"slutle!"