The act of backing out of any activity/action/engagement/promise after having verbally and publically committed to it.
Mr. Lewis murtled after telling everyone he was going to the rally.
Mr. Gene murtled out of going to the bar with his friends because he was stuck under his boss's desk....again!
When a girl is laying down , you go up to her and put your nuts over her nose and whenever she breathes through her nose it makes a flapping noise.
My girlfriend sneezed while giving me a BJ and I let out a huge murtle.
Modular Turtle: A modular footwear that can change skins, through a screw and nut mechanism.
To be s odrunk mispronunciation of words is common.
Mortal -> Murtle
I think I'm murtle me!