1) Having the least fat 2) Least fat 3) Least fatty 4) Least pinguid 5) Least plump 6) Least pyknic 7) Like buffalo, red meatwise 8) Like the best cut of meat 9) Lowest in fat 10) Most angular 11) Most austere 12) Most barren 13) Most economical 14) Most economical in business 15) Most efficient 16) Most gaunt 1) Sparest