A
lasso, also called
lariat,
riata, or
reata, is a loop of rope designed as a restraint to be thrown around a target and tightened when pulled. It is a well-known tool of the Spanish and Mexican cowboy, then adopted by the American cowboy. The word is also a verb;
to lasso is to throw the loop of rope around something. Although the tool has several proper names, such terms are rarely employed by those who actually use it; nearly all American cowboys simply call it a "rope," and the use of such "roping".