Disconnect Twitter Integration
Log in to Tumblr, then click the gear icon to open the Settings menu. Click the blog to disconnect from Twitter in the right panel. Scroll to the Twitter section, then slide the “Share Your Posts on Twitter” switch to off to disable the service. Click the “Logout” link next to your Twitter username to disconnect your Twitter account from your Tumblr blog.
Temporarily Disable
When you enable Twitter integration, the blue Twitter bird appears in the New Post form. Just click the blue bird in the New Post form to temporarily disable integration with Twitter for the post.
