From the 1974 Roman Polanski film written by Robert Towne and starring Jack Nicholson. Chinatown refers to a situation in which helping makes things worse; an unintended consequence the exact opposite of what was desired; a trauma that keeps repeating itself; a character flaw that keeps re-emerging.
"Aid Syrian rebels and stop Assad? Forget it, the whole region is Chinatown."
A dirty, stinky, filthy place where there are litter on the ground, smokers, and beggars sitting around waiting for a donation. One might randomly appear and wash your car dashboard for money. Most of the shops and restaurants there are Chinese.
Person 1: Let's go shop at Chinatown!
Person 2: ...
Person 1: At least they got some cheap ripped DVDs.
A slang term for a woman's genetalia in reference to the act of cunnilingus. Often considered crude and sometimes derogatory, however it is often a term of endearment among those with an extensive history of sexual activity with one another.
Honey, I'm going down to Chinatown tonight. Get ready.