One who haws; a person or animal that turns to the left in response to the command, or someone who makes the 'haw' sound.
Agent noun formed from 'haw' plus the '-er' suffix, creating 'hawer' to mean 'one who haws.' Follows the productive English pattern of adding '-er' to verbs to make agent nouns.
A 'hawer' isn't a common word today, but the '-er' suffix is so powerful in English that you could call anyone or anything 'one who does X' by just adding '-er,' which is why new agent nouns are constantly created in specialized fields.
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