Quick question; Whats a "Slash" story?

I know, I'm really lame.
I'm just curious.
I see them posted basically everywhere, and I've never read one; I also don't know what they're about.
Is it like a homosexual fanfic between two guys, or something?
I'm slow, all I need is one comment, and I'll delete this.

Please ignore my stupidity.
Thanks.

BUT I HAVE TO MAKE THIS 100 WORDS SO I'M DOING THIS;
Sassy loves Christopher Joseph Kamrada from There for Tomorrow &
Alexander William Gaskarth and Jack Bassam Barakat from All Time Low.
& Garrett Daniel Nickelson from The Maine.
<3
<3
<3
I'M REALLY WEIRD.
Hopefully this is 100 words now.