Mud, short for muddle, is loam, silt or clay mixed with water. It is usually formed after rainfall or near water sources. Ancient mud deposits hardened over geological time to form sedimentary rock such as shale or mudstone. When geological deposits of mud are formed in estuaries, the resultant layers are termed bay muds. Mud has also been used for centuries as a construction resource for mostly houses and also used as a binder. Mud has also been proved to be almost vital to skin as it can reduce signs of ageing, shrinks pores, removes blackheads, clears acne, and leaves skin tighter and glowing. Mud is created by fungi and microbes as they break down rock.

पंक (mud) मृदा, दोमट मिट्टी, गाद या मृत्तिका का जल के साथ बना मिश्रण होता है। प्राचीन पंक के जमावड़े भूवैज्ञानिक समयकाल के लाखों-करोड़ों वर्षों के साथ कठोर होकर अवसादी शैल बना देते हैं।