What is Omcd?
1.
Oh My Charles Darwin, a form of OMG for evolutionists.
boy: OMCD did you see that?
See
2.
Surprisingly there's people who are kind of lost with all these modern internet abbreviations and such like.
That said OMCD means
OMCD also associates to several company names.
<dumbguy> OMCD! I just accidentally killed my rabbit!
See