noun. A precise device capable of measuring when the moon will crush California or I will get tattoos of Count Chocula and Vic Mackey on my butt (my testicles--those rowdy boys--are a different story).
Real citation: "The Snowball's-Chance-in-Hell-O-Meter
The Eight People Fighting to Be Your Next Mayor"
(July 7, 2009, Dominic Holdem, The Stranger, http://www.thestranger.com/seattle/the-snowballs-chance-in-hell-o-meter/Content?oid=1806389)
Made-up citation: "I think my snowball's-chance-in-hell-o-meter is broken. If not, maybe this is the year PJ Harvey starts returning my calls..."