How to write 老板老板

prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity; old (of people); venerable (person); experienced; of long standing; always; all the time; of the past; very; outdated; (of meat etc) tough

board; plank; plate; shutter; table tennis bat; clappers (music); accented beat in Chinese music; hard; stiff; to stop smiling or look serious