2004 Civic was "booger" because "it aint any bigger than a booger" -according to my mother.
2007 Wrangler was "ruby" because it was "ruby rock red" or something of that sort.
And currently, the 2006 MS6 GT is "miss mignight" because shees black. Also, the voice in the nav is Rita, she helps me find my way from time to time.