The term 'STRAIGHT, AT A BAR' can be summarized as a four-letter word, 'NEAT'. This term is often used to describe a drink that has been served without any additional ingredients or garnishes. It is usually served in a glass with ice and is considered to be the most basic form of a cocktail. The term is also used to describe someone who is well-dressed and well-groomed, as well as someone who is honest and direct in their speech.