drunkard; drunken man
A somewhat literary or old-fashioned term for a drunken man, often with a nuance of a disreputable or rowdy drunk.
夜道で酔漢に絡まれた。
I was accosted by a drunkard on the street at night.
駅前に酔漢が寝転
A drunken man was lying in front of the station.
Compound of 酔 (sui, 'drunkenness') and 漢 (kan, 'man'). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning.