Well, luckily, Cards Against Humanity online is here to fulfill that need. It's not official, it's not finished, and it's pretty confusing to use at the moment, but bookmark this page and soon enough you'll be borderline-upsetting people in person and over the Internet!
The extra-fun part about this online version is that there are a bunch of expansion packs that don't exist in real life. That includes the thrilling Derps Against Humanity deck — something that needs to be sold in stores as soon as possible, if you ask us. And, though there's a '90s nostalgia expansion pack as well, playing CAH online also has a very early-Internet vibe to it at the moment. Not entirely user-friendly but fun...in a throwback sort of way. Check it out here, or wait for the app to be fully developed and play your cold little heart out then.