A computer virus (or other form of malware) contracted from a porn site.
Can be abbreviated as DSTD.
1. "Careful on that side, dude. You might catch a DSTD."
"Hmm, you're right. I'd better put on my browser condom."
2. "Low awareness of Digital STDs is a serious issue that negatively impacts the lives of countless non-tech-savvy horny individuals."