Crossword puzzle clue "one to whom you might say g'day"

One to whom you might say "G'day!"

One to whom you might say, "I doubt that"

He might say "A day without you is like a day without sunshine"

Whom you might say "Go figure!" to? (Abbr.)

Whom you might see in your rearview mirror if you ignore the above signs

You might rate them on their route and they might rate you on you vomited everywhere

"One day you're in, and the next day you're ___" ("Project Runway" catchphrase)

Sounds you might make when I say "Would you rather watch your parents have sex or have your parents watch you have sex?"