lie outrageously - Everything2.com

One of the most extreme forms of spreading untruth. Often seen among small children when trying to validate their heinous transgressions against common sense, the status quo, or civil behavior.

Examples:

"I couldn't have taken that candy bar because I was walking home from France where I went to pick up my homework that got taken by a polar bear when I was walking to school which is why I was tardy too."
"Yes, I did invent the atomic bomb in my basement with two pieces of bubble gum and a collection of dirty twigs."
"I don't want to have sex with you. I just want to sleep together."

On the dangers of incomplete quotes	Sleep together	Smiling dryly while I lied.	status quo
untruth	lying here with no one near	Tardy	Polar bear
heinous	Civil	school	might makes right
Bubble Gum	Twig	Transgression	Indiscretion
validate	Native American	behavior	lie
atomic bomb	Candy