first aid
Ⅰ
noun
1
a blade (as a weapon); a razor blade. Rhyming slang; thought to be inspired by the catchphrase threat: 'Can your wife [or mum] do first aid? Well get her to stitch this up' UK, 1992.
2
a small shop that sells, amongst other commodities, patent medicines BARBADOS, 1965
Ⅱ ⇨ first aid kit; first aid
noun the female breast. Rhyming slang for TIT; usually plural UK, 1992