One of my Fraternity Brothers is a big guy as well and he conceals a Glock 22 just by ordering big and tall sized shirts online and let's the shirt tail hang out.
I actually did that too, cause I'm on the tall side and prefer a longer shirt for concealing when it is 95 degrees in the shade.
NRA Life Member
Ladyfriend: "I need help with the leaves in the yard"
Me: "Controlled burn?"
LadyFriend: "I forgot my Boy Scout turned into an infantry officer."