1. [1970s+] (US black) the penis [its supposed resemblance, when flaccid, to a cooked noodle].
2. [2000s] (US) a Chinese or East Asian person.
[2010s] (Aus.) short tight male bathing trunks.
SE in slang uses
[1990s+] (US) a general term of abuse; the over-riding image is of impotence, i.e. a penis limp as a cooked noodle.
[1920s] (US Und.) nonsense.
[1900s–30s] (US) a Jew.