"are you sure you can move that bed downstairs by yourself? "what do you mean 'am i sure?' i'm a grown ass man
(grown ass-man) what an immature male may inadvertently, though accurately call himself when others question his ability to do anything
""are you sure you can move that bed downstairs by yourself? "what do you mean 'am i sure?' i'm a grown ass man" What is the definition of "grown ass man"?