SHACK Meaning of SHACK in English ■ noun a roughly built hut or cabin. ■ verb ( ~ up ) informal move in or live with someone as a lover.OriginC19: perh. from Mexican jacal , Nahuatl xacatli 'wooden hut'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004