Cantonese word for "perverted".
Used to describe people who have an insatiable appetite for sexually related things such as strip clubs, women, sex, and porn. These people also like to grab people in the most inappropriate places in public.
hence the term "hamsup lo" - "perverted guy".
Fellowships of hamsup people will often refer to one another as "hamsup gor" or "perverted brother"
"Yo, could you stop being so hamsup?!?"
"That guy is such a hamsup lo, he keeps staring at those girls and sometimes he'll even grab their asses when they walk by."
"hamsup gor, what are you doing today? Going to the strip clubs again I see..."
"You've just been hamsupped!!!!"