While the word
wanker is a more general and term for expressing disdain for somebody, the word LAF describes a person with a tendency to show off or brag in an excessive and embarrassing
way.
LAF can also be used as
alternative assignment of feminine behaviour.
"well at first i
thought this guy delivers, but in
the end he was just another laf."
"don't be such a LAF, come and drink with the
boys"