I was pretty bored earlier so I thought "hm I wonder what I would look like with thicker eyebrows." Mind you, I've never touched makeup in my life. I know next to nothing about it. I found a stick that said "CoverGirl easy breezy eyebrow" and then put some on my eyebrows. I said "cool" and then tried to get it off.
The problem is that it would not come off. How the hell do I get this stuff off? Preferably with common household stuff. Help.
Edit: Found some makeup wipes, put too much oil, now my face is covered in olive oil. Accidentally rubbed too hard and got out patches of my eyebrows, but the makeup is finally out. RIP. Thank for y'all's help.
Makeup wipes are crucial. If it's an emergency you can use Vaseline to help get it off. Old School is soap and water but trying to get the makeup off just once like that rubbed my skin raw.
Big thing is that these are not water-based and require a little bit of solvent help get along. One of the safest things to try would probably be a little bit of olive oil. 
For future reference, in a pinch, any sort of alcohol will usually help dissolve makeup. I often use hand sanitizer and q tips if I need to remove stray smudges of eyeliner if I get it all over the place. This also helps if your skin is super oil sensitive like mine.
There is unfortunately no way to make your hair thicker, but you could try making them a bit darker for a similar effect. Just go light with it, if you go too heavy you risk caking your brows.
Do you have any olive/cooking/etc oil laying about? A lot of makeup is oil based so should at least partially come off with that, especially if you apply it to some type of towel/wipe/cotton ball first (could even use toilet paper in a pinch but I don't recommend it if you can avoid). Apply sparingly enough that it doesn't drip or anything, and definitely test it in a small area first to make sure it has the desired results!