The phrase "Smoke 'em if you got 'em" or "Smoke if you got 'em" is slang for "do what you want, if you have the means". The first phrase was popular in the United States military during World War II, meaning to take a break. Officers would say "Smoke 'em if you got 'em", allowing the soldiers to take a break and smoke their cigarettes, "if you got' em" referring to the vagaries of war. Cigarettes were nearly impossible to get in Europe during that time because of the deprivations of the war.
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