used in 嗎啡|吗啡[ma3 fei1]

(question particle for "yes-no" questions)

variant of 幹嘛|干嘛[gan4 ma2]

(neologism, attested by 2014) (slang) Are you interested? (originally an invitation for casual sex, later generalized as a playful or humorous invitation for any activity)

isn't that so?

(slang) would be better (abbr. for 這錢買排骨它不香嗎|这钱买排骨它不香吗[zhe4 qian2 mai3 pai2 gu3 ta1 bu4 xiang1 ma5] for that money, a pork cutlet would be more appetizing, would it not?)