Where does “피말강이” come from?

피말강이 (Korean) comes from Korean 피, from English pee, from English piss, from Middle English pisse, from Middle English pissen, from Old French pissier, from Vulgar Latin pissiare, from Latin pissio — I piss.

Ancestry of “피말강이”, step by step

피말강이 traces back through two separate lines of ancestry.

via Korean

StepLanguageWordMeaning
1Koreanblood; kinship, consanguinity
2EnglishpeeUrine; To urinate; To drizzle
3EnglishpissUrine; An instance of pissing; Alcoholic...
4Middle Englishpissepiss, urine; Alternative form of pissen
5Middle EnglishpissenTo piss; to deliver urine from the genitals; To...
6Old Frenchpissierto piss; to excrete urine
7Vulgar Latinpissiarepresent active infinitive of *pīssiō
8LatinpissioI piss

via Korean —이

StepLanguageWordMeaning
1Korean—이For non-honorific nouns ending in consonants, the nominative case particle marking it as the subject of a verb or adjective; see also Usage Notes
2Middle Koreanperson
Every word from Latin pissio