verb (intr, preposition)
used informally and often ironically to add emphasis to a statementall his plays have such ridiculous plots — talk about good drama!
know what one is talking about to have thorough or specialized knowledge
Let’s Pause And Talk About CommasEverything you want to know about when to use a comma. Learn all the ways to use a comma and the rules for when to use a comma.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012