mwah

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

Word Origin and History for mwah

sound indicative of a kiss or an air-kiss, 1994, imitative.

Online Etymology Dictionary, © 2010 Douglas Harper