(third-person singular simple present rosas, present participle rosaing, simple past and past participle rosaed)
- (slang, Australia) no-show, someone who does not show up as expected
- Every time we organise to have dinner, she never turns up.
- I know, she is such a rosa.
Believed to derive from the name of the Australian native bird rosella (genus Platycercus), a small parrot noted for its ability to vanish when the need arises.
From Latin rosa (“rose”).