brace and bit; brace
noun
1
the equipment needed to prepare and inject a drug. Rhyming slang, from OUTFIT NEW ZEALAND, 1999.
2
the female breast. Rhyming slang for TIT, usually in the plural. Sometimes shortened to 'brace' US, 1928.
3
an act of defecation. Rhyming slang for SHIT. Sometimes shortened to 'brace' UK, 2003