A guy is a man. (INFORMAL)
I was working with a guy from Manchester.
Americans sometimes address a group of people, whether they are male or female,
as guys or you guys. (INFORMAL)
Hi, guys. How are you doing?...
Mom wants to know if you guys still have that two-person tent.
Food that is crispy is pleasantly hard, or has a pleasantly hard surface.
...crispy fried onions.
...crispy bread rolls.