mother-in-law seat
informal
noun
An extra seat at the back of a two-seater motor car or aircraft; specifically = dicky.
Origin
1960s.
- undeveloped
- undeviating
- undeviatingly
- undiagnosed
- undid
- undies
- undifferenced
- undifferentiated
- undigested
- undignified
- undiluted
- undiminished
- undimmed
- undinal
- undine
- undiplomatic
- undiplomatically
- undirected
- undiscerning
- undischarged
- undisciplined
- undisclosed
- undiscoverable
- undiscovered
- undiscriminating