squeaky-clean

[ skwee-kee-kleen ]
/ ˈskwi kiˈklin /

adjective Informal.

scrupulously clean.
virtuous, wholesome, and above reproach: a squeaky-clean reputation.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for squeaky-clean

squeaky-clean

adjective

(of hair) washed so clean that wet strands squeak when rubbed
completely clean
informal, derogatory (of a person) cultivating a virtuous and wholesome image
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