Definition of the word lap up

The expression "lap up" is derived from the behavior of animals, particularly dogs, who curl up and rest their heads on their paws, with their mouths open and tongue out, while drinking water. As water enters their mouths, they actively swallow it, typically with audible slurping sounds. This phrase originated in the early 19th century, and its first known written usage was in the poetry collection "Chantzies of Scotland" by Robert Burns in 1800. It initially referred to birds, who would "lap up" spilled feed or water from the ground rather than peck at it. The usage expanded to animals and humans alike, where the term came to symbolize actively and enthusiastically devouring or accepting something, especially when it is pleasurable or considered a luxury. The phrase has evolved to include more colloquial variations, such as "lap up like a cat" or "lap up every word". It is often used in reference to animals, but also in everyday English when describing people's eagerness or enthusiasm for something, such as reading a book, learning a new skill, or accepting praise.