if you're interested in going one step further, you can read this post from Nerds Against Humanity about how and where to have good-quality, regulation sized cards made from the printable cards available on this blog.
If you'd rather play online, you can load the Musicals Against Humanity cardcast deck into Pretend You're Xyzzy. The deck code is VJNYS.
Q: Is it okay to save these cards and then reupload them to combine them on a new post?
A: Yes, although I ask that you (a) tag my url and (b) add a source link in the caption to redirect people to this blog.