Green’s Dictionary of Slang

(US campus) a womanizer.

1893		D. Barber et al. (eds) 93 S Class Book Yale U. (New Haven, CT ) 103: Nicknames [...] January — ‘Jan,’ ‘Nig,’ ‘Nigger,’ ‘Warrior,’ ‘Alligator,’ ‘Fusser’ [...] McCormick — [...] ‘Cherub,’ ‘Cupid,’ ‘Sweet,’ [...] ‘Fusser’.
1894		Star-Gaz. (Elmira, NY) 15 May 4/3: [headline] yale college slang / [...] / You May be a ‘Fusser’ and ‘Full of Tacks’ and be ‘Dead Smooth Enough to Cut ice and ‘Have Wheels in Your Head’.
1904		Wash. Post 17 Sept. 11/6: An instance of the rapidity with which a new piece of slang travels across the country is shown by the term ‘Fusser.’ [...] A fusser, it seems, is an habitual beau or lady’s man.
1917		S.F. Examiner 23 Sept. American Wkly sect. 6/1: [H]e seemed to nurse but one purpose in life — to be known as an irresistable ‘fusser’ — college term for masher.
1924		Jrnl & Courier (Lafayette, IN) 18 Nov. 9/3: While far from a woman-hater [Red] Grange holds no records as the ‘college-fusser’.