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2.
While neither an officially abbreviated word nor a recognizable transitional verb, the word is an valid auto-generated substitution within the iPhone's keypad. It is generally followed by the phrase 'it do?' as an inquiry regarding one's status however by itself it is not easily understood.
"What'd? What'd my iPhone think I was trying to type? That ain't proper grammer."
by dubya bejay April 29, 2009
 
1.
a combination of "what" and "Did".
"What'd you do today?"
by Jay4J September 04, 2013