An implement to be used as a measuring device. Give a naked man a cricketbat to conseal his naked parts, and the height at which he holds the cricketbat will determine the size of the 'bat' that lies beneath.
i.e. If the bat is higher,there is less to conseal. If the bat is lower...well, lucky you.
'Billy holds his cricketbat awfully low, if you know what I mean...*raises eyebrows suggestively*'
'Aww man, I saw how high he was holding his cricketbat. I'm sorry, girl.'