
Toff
Social Stereotype
Toff often implies stereotyped traits of the upper class, not just wealth, such as being out of touch with ordinary people. 
Mildly Derogatory
'Toff' can be used humorously or slightly insulting to suggest someone is overly posh or snobbish. 
Colloquial UK
'Toff' is common in British English and might not be understood or used in the same way elsewhere. 