Definition of standover merchant in English:
 standover merchant
(also standover man)
nounˈstandəʊvə ˌməːtʃ(ə)nt
Australian informal A person who uses intimidation to impose their will.
 a rather unpleasant example of a political standover merchant
Example sentencesExamples
-  He didn't know of Hammer's friend Steiger, one of the last, old-fashioned standover merchants on the coast.
 -  I wouldn't have no standover merchants or drugs or ratbags in the place.
 -  Not all standover merchants in the sex industry go to prison.
 -  He claimed he was being made a scapegoat by the inquiry and strenuously denied he was a standover man.
 -  The prisoner who wears a gold bracelet or gold watch is, assuming he is not one of the predators or standover merchants, more likely to be on the receiving end of violence.
 -  The two were standover men who had warned the nightclub owner that his club 'might go up' at any time.
 -  All I can say is, pity help the would-be standover merchant who tries to lean on, or recruit, those siblings.
 -  He drifted into crime, beginning his long career as a standover man.
 -  How could one man evade an entire police force and a support group of experienced Italian standover merchants?
 -  For years he'd worked on the wharves, notorious for standover men.
 
Origin
1930s: from the Australian sense of stand over 'threaten, extort money from' + merchant.