Definition & Meaning of "pisshead"in English

What is the origin of the term "pisshead" and how is it used?

"Pisshead" is a slang term that appeared in English, particularly in Britain, in the mid-20th century, combining "piss" (slang for urine, later extended to alcohol) with "head" to describe someone who drinks excessively or is frequently drunk. The metaphor equates heavy drinking with loss of control or personal decay. It is used in informal, often teasing or critical contexts, among friends, in pubs, or in popular media. The term is derogatory, though sometimes used humorously; its offensiveness depends on context and tone.