Ah Beng is a term commonly given to a member of a group of young
Chinese men in Southeast Asia, particularly Singapore and Malaysia.
These Chinese men, whose age ranging from their early teens to late
20s, usually centralise in the busier and more developed cities in
the region, but are usually seen as originating from smaller or
more rural towns. Ah bengs typically speak local slang, which is
Hokkien or Cantonese mixed with English and Malay, such as Manglish
or Singlish. They are often stereotypically portrayed to be
anti-intellectual, superficial and materialistic and shallow. These
values often lead to a lack of culture or indulgence in criminal
activity or being involved in brawling or affray out of
disagreement with other people. Ah bengs are also sometimes
associated with extensively-modified or zhng-ed cars, and are
stereotypically seen as being excessively flashy and
show-offs.
The term 'Ah Beng' is also sometimes used to describe young Chinese
men in Southeast Asia who cannot speak fluent English and/or have
graduated from the secular Chinese education system of the
region.
Quoted from wiki.