From Longman Dictionary of Contemporary Englishrattlerrat‧tler /ˈrætlə $ -ər/ noun [countable] informalHBA a rattlesnake
Examples from the Corpus
rattler• The third woman went to pull a weed in her front yard and a rattler bit her hand.• As a rule, however, a rattler avoids contact with people and will strike only if cornered.• One lady was on her morning walk and picked up a rattler she saw on the road.• Florida rattlers would rear up and bite a man too blind and tired to kick before reaching down.• But on the trail Sheila rides there isn't a long horn or rattler in sight.• I study a run-over rattler I take to be dead until it suddenly slithers away.• The rattler is behaving very strangely, in other words. 