Wiktionary
big guy
n. 1 (context singulare tantum English) (non-gloss definition: A term of endearment, usually addressed toward an all-around good male person.) 2 (context countable English) (&lit big guy English)
Usage examples of "big guy".
That scared me plenty, because he looked small enough to do it if he wanted to, and a couple of big guys like us would never have been able to follow him.