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1.
Grossly irreverent toward what is or is held to be sacred. Or extremely disrespectful towards sacred things.
Joe: Thank you lord for everything.
Dan: Hey man oh sweet Jesus!
Joe:Oh my gosh stop licking the lords mothers Breasts you sacrilegious boy! This is a sacred place and she is sacred person!
Dan:Freakin hot mother of Jesus!
by home girl liz December 24, 2008
 
2.
A word that does not rhyme with pudding.
From Drew Carey's Improv-a-ganza:

Word from the SATs: sacrilegious

Susan Boyle: A word that doesn't rhyme with pudding!
by Laurelei Kirsch June 10, 2011