1. a shameless falsehood told without trying to hide it
he/she told a barefaced lie
'A barefaced lie' is a lie that is told without any attempt at concealment. The implication is that the person who tells ‘a barefaced lie’ is aware that others might know they are lying or will probably find out. This term usually has a negative connotation and is used in social contexts more than professional ones. Similar in meaning to 'lie to your face'.