The phrase "a rob" is not correct and usable in written English.
It appears to be an incomplete or incorrect expression, as "rob" is typically used as a verb rather than a noun in this context.
Example: "He attempted a rob, but it was unsuccessful."
Alternatives: "a theft" or "a robbery".
"Maybe a Van Gogh, maybe a Rob Pruitt.
Time, perhaps, for a Rob Roy.
He said the Dallas game was punishing, but nothing out of the ordinary against a Rob Ryan-coached defense.
The cocktail was delicious, calling to mind a Rob Roy by way of the spas of Sedona, Ariz.
Um, how England desperately need a wicket... "Large man in a 'Rob Smyth Fan Club' T-shirt?
I grew up in Massachusetts, where I had to wait until I was 10 to get my ears pierced at a Rob Roy salon.
We provide an RoB tool for animal intervention studies (SYRCLE's RoB tool).
The Cochrane RoB Tool was the starting-point for developing an RoB tool for experimental animal studies.
Here, the SYstematic Review Centre for Laboratory animal Experimentation (SYRCLE) presents an RoB tool for animal intervention studies: SYRCLE's RoB tool.
— Jeff Gordinier The Mississippi Press: A guy robs a Pizza Hut.
Weeks later, in June, a gunman robbed a Family Dollar store in Queens.
