幹嗎

Etymology 1
+ . Colloquial; the formal equivalent in Standard Mandarin is or.

The second element is cognate with in Standard Mandarin, and is usually written as  when writing Tianjin dialect. Dictionaries only consider toneless ma (declarative particle) as the only proper use of. All other senses, including the dialectally influenced pronunciation of má ("what") and the interrogative particle of ma, are considered incorrect. However, there is much confusion in actual writing, possibly with being used more commonly for this sense.

Verb

 * 1)  what is (someone) doing; what is going on
 * 2)  what is wrong; what is up
 * 1)  what is wrong; what is up

Adverb

 * 1)  why; why on earth; whatever for