The term "gob" refers to the mouth, particularly in informal British English. It is often used to describe someone who talks a lot or speaks in a loud manner. The word can also imply a sense of cheekiness or boldness in how someone expresses themselves. In addition to its meaning as a mouth, "gob" can also refer to a lump or mass of something, such as a gob of spit. This usage highlights the informal and sometimes playful nature of the word, making it a versatile term in casual conversation.