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A condom that you keep in your wallet in spite of the fact that you know you already have a girlfriend.
'He's gone to see that bird again'

'He's proper gonna get her up the duff, his Mrs will find out!'

'Don't worry youth he's packing a banter sheath just incase'
by babadobey January 04, 2010

Words related to Banter Sheath

bag condom johnny rubber sheath