If personal (e.g., you referred to a physical attribute, big mouth, flaring nostrils, lack of brain power, bad breath, body odor, etc.), then apologize and be humble, very humble. If business-related (e.g., you said something about his big plans and tiny budget, his lack of business acumen, etc.), send a brief apology and be self-mocking. Something like, “I put my foot in my mouth and stumbled. I honestly regret making those comments. Please forgive this faux-pas on my part.” Maybe add a special feature to the campaign—at no charge. And of course, make sure in the future you are far enough from any source that could overhear you letting up steam.
Tips of the Trade: “Four Cures for Foot-in-Mouth Disease”
If personal (e.g., you referred to a physical attribute, big mouth, flaring nostrils, lack of brain power, bad breath, body odor, etc.), then apologize and be humble, very humble. If business-related (e.g., you said something about his big plans and tiny budget, his lack of business acumen, etc.), send a brief apology and be self-mocking. Something like, “I put my foot in my mouth and stumbled. I honestly regret making those comments. Please forgive this faux-pas on my part.” Maybe add a special feature to the campaign—at no charge. And of course, make sure in the future you are far enough from any source that could overhear you letting up steam.