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A garment is an item of clothing that is worn on the body, typically consisting of fabric or other material that covers or drapes over the body. Garments can vary in style, length, and shape depending on the culture, occasion, or personal preference. They can be designed for a specific purpose, such as workwear, sportswear, or formal wear, or they can be more casual and suitable for everyday wear. Garments can be made from various materials, such as cotton, silk, wool, or synthetic fibers, and they can be embellished with decorative elements like buttons, zippers, or embroidery. Proper care and maintenance of garments, including washing and storage, can help prolong their lifespan and preserve their appearance.

An outfit generally refers to a complete set of clothing or garments worn together, typically chosen for a particular occasion, function, or purpose. An outfit can consist of a top, bottom, and shoes, but may also include accessories such as jewelry, belts, hats, scarves, or handbags. The term "outfit" is often used in a fashion context, and may be used to describe a coordinated ensemble that is designed to create a specific look or style. Outfits can vary widely in style, from formal and professional to casual and laid-back, and may be chosen to reflect an individual's personal taste, cultural background, or social status.

Fashion is a popular style or trend in clothing, accessories, makeup, or behavior that is prevalent at a particular time. It encompasses a wide range of styles and trends, from high fashion and haute couture to streetwear and casual wear. Fashion is often influenced by cultural and societal factors, as well as historical events and technological advancements. It is a constantly evolving industry, with new trends and styles emerging and old ones fading in and out of popularity. Fashion is not only a means of self-expression and personal style but can also be a reflection of individual or collective identity and values.

A trend refers to a general direction in which something is developing or changing, often used in reference to fashion and style. It can describe a popular clothing item, color, pattern, or overall style that is currently favored by a particular group of people or society as a whole. Trends may be influenced by a variety of factors, such as cultural and social changes, technology, economic conditions, and media exposure. They can be short-lived or long-lasting, and often evolve over time as new ideas and innovations emerge. Following trends can be a way for individuals to express their personal style and keep up with the latest fashion, while designers and retailers rely on trends to stay relevant and meet consumer demand.

The origin of the idiom "know one's stuff" is derived from the word "stuff" in the sense of knowledge, expertise, or skills. It is a colloquial expression that has been used to describe someone's proficiency or competence in a particular field or subject matter. This expression is used to convey that someone possesses a deep understanding and expertise in a specific area or topic. It is often employed to commend or acknowledge a person's knowledge and competence, especially in professional or academic contexts.