be built like a tank

To have a physique or structure that is strong and physically imposing. George started going to the gym every day since January—now he's built like a tank! These bomb shelters are built like tanks by design, so they can withstand anything. You really think we'll be able to sneak past that bouncer? He's built like a tank!

be built like a ˈtank

(also be built like a ˌbrick ˈshithouse taboo, slang) (of a person) be very big and strong: He’s a wrestler? Well, that doesn’t surprise me — he’s built like a tank!