(colloquial) What did you just say? Synonym of say again
Used other than figuratively or idiomatically: see what, was, that.
Source: en.wiktionary.orgWhat was that you were saying just before the food arrived? Something about me... no competition... best thing that ever happened to you... Suzanne Collins
What was that you tried to say? Thom Yorke
What was that thing that could make two people promise one another to spend every day of the rest of their lives together? Ah, I found it. It was a thing called love. A small simple word. Cecelia Ahern
So what was that all about?" "I think," Jace said, "that she asked if she could touch my mango." "Shethat?" Jace shrugged. "Yeah, then she gave me her number. Cassandra Clare
The next thing I knew I was listening to five people shouting. What was that all about, anyway? Cassandra Clare
What was that whiteness? Truth? A pebble of quartz? For once, then, something. Robert Frost