|From Engrish & Hanzi Smatter|
The top two characters appeared to me as mirrored 决心 ("determination"). I have no idea what the reference of two characters below, 伐大, is about. 伐 means "[to] cut down", and 大 means "big".
I think the model has unintentionally tattooed himself with "determined to cut down something big".
Update: I found a photo of the same male model via Google, who is he?