(UK, Australia, New Zealand, jocular, slang) The mouth.
2005, Brian Castro, The Garden Book, Giramond Publishing, NSW, [http://books.google.com.au/books?id=cMEvsSz6oZ8C&pg=PA109&dq=%22laughing+gear%22+-intitle:%22%22+-inauthor:%22%22&hl=en&sa=X&ei=236eT8r3OIaUiQed3PizDg&redir_esc=y#v=onepage&…
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