MeaningEr, no, that's not from Hamlet. It's from All's Well That Ends Well (I.iii).
Usually refers to one's family. Sometimes used (as in Shakespeare's original) to denote all living creatures.
Origin
From Shakespeare's Hamlet.
Clown: I have been, madam, a wicked creature, as you and all flesh and blood are; and, indeed, I do marry that I may repent. --Flesh and Blood (The Prhase Finder)
I love quirky online databases, too, but here's one example of why failing to confirm what you find online can lead to trouble. The consequences in this case are negligible, but imagine somebody going online to make health-related decisions!
Could you please tell me what the exercise is for Lit. Study, the one involving quotations. Where can it be found, maybe I missed something.
It should be up now. I've got to go offline now, but I'll check back later. Thanks for checking.