One who in debauchery surpasses the rest of his companions, a blood or choice spirit. There are in London divers lodges or societies of Bucks, formed in imitation of the Free Masons: one was held at the Rose, in Monkwell-street, about the year 1705. The president is styled the Grand Buck. A buck sometimes signifies a cuckold.
A BUCK OF THE FIRST HEAD
Meaning of A BUCK OF THE FIRST HEAD in English
Slang English vocab. Английский сленговый словарь. 2012