In this article, I explore a Wittgensteinian approach to blasphemy. While philosophy of religion tends to have very little to say about blasphemy, we can note two key, typically unchallenged, assumptions about it. First, there is the Assertion from Anywhere Assumption: whether one can successfully blaspheme is entirely independent of one's religious views, commitments, or way of life. Second, there is the Act of Communication Assumption: blasphemy is essentially an act of assertion. I contend that a Wittgensteinian approach rejects both assumptions and, thus, reorients our conception of blasphemy. Take two characteristically Wittgensteinian claims. First, religious statements/beliefs have a different ‘grammar’ than empirical propositions. Second (and relatedly), holding religious beliefs necessarily connects with how one lives. Wittgensteinian blasphemy rejects the Assertion from Anywhere Assumption: to blaspheme, one must be in or have been in the religious framework one blasphemes. Being entirely outside of that context divests one's blasphemy from its proper content. Second, Wittgensteinian blasphemy rejects the Act of Communication Assumption: if religious belief is centrally a form of life, then blasphemy must be lived out as well. Wittgensteinian blasphemy is less about the utterances one makes and more about how one's life intersects (or fails to intersect) with religiosity.