Older, second or third year students, or even members of the public who prey on vulnerable, very drunk freshers during freshers week
guy: I cant come out with you guys, its freshers week!
mates: You dont go to university!
guy: i know, i'm just out for a fresher fuck!
-- example 2 --
Girl: you creep, im not going anywhere near you
Guy: can you blame a guy for trying?
Girl: You are all the same, just out for a fresher fuck!
Guy: You said it sweetheart!