Taking a ride on the fanny tran is when someone is ignoring you. You turn your back to them so they can see your fanny. It is basically your ass transit.
Jon: Hey Stephan
Stephan: *turns back*
Matt: Jon, your taking a ride on the fanny tran!!
When somebody has sand in between there ass cheeks or up there asshole making them grumpy and angry.
Jessica: YOUR A TOTAL MCDOUCHE N HUMP!!!
Jon: Smells like the beach!
Matt: She has sandy cheeks!!
Jessica: FUCK YOU MATT!
Stephan: Want me to suck the sand out?
Luke: Ill get the vacuum!
Sour asscheeks is a term meaning someone is grumpy and grouchy.
Sometimes when they have lemon juice in there asshole or on there ass cheeks causing irritation!
Jessica: IM GONNA SHOVE U UP MY VAGINA AND PULL YOU OUT MY NOSE ASSHOLE!!!
Matt: I poured lemon juice on her asshole!
Jon: She sure does have some sour asscheeks!