"Lasso" is a verb, not a noun. You can lasso someone or something, but you have to do it with a rope, a lariat, a reata or riata, a running noose, a slip noose, bola, twine, maguey -- but not a lasso. Of course, you can lasso a dogie with a lariat or your old maguey, but never a lasso. Only tenderfeet and effete Easterners think otherwise.