Penal Code Section 294
294. Whoever, to the annoyance of others—
(a) does any obscene act in any public place; or
(b) sings, recites or utters any obscene song, ballad or words in or near any public place,
shall be punished with imprisonment for a term which may extend to three months or with fine or with both.
Please refer to the Attorney General's Chamber of Malaysia's website for the latest law.