The phrase "spake the cuff" is another way of saying someone spoke without thinking or planning what they were going to say. Other synonyms for this phrase include "spoke off the top of their head," "spoke spontaneously," "spoke on a whim," "spoke impulsively," or "spoke without forethought." These phrases all communicate the idea that the speaker did not carefully consider their words before speaking. It is important to think before we speak, as our words can have a powerful impact on others. By being mindful of our language, we can communicate more effectively and build stronger relationships with those around us.