Robert E. Lee
noun
1
a quay. Dockers' rhyming slang, formed on the name of the Confederate army general (1807–70) UK, 1961.
2
the knee. Sometimes abbreviated to 'Robert E.' or the simple 'Robert' UK, 1992.
3
urine; an act of urination. Rhyming slang for PEE or WEE UK, 1998