A Dirty Michael or a Dirty Mike is when you go to the bathroom to take a medium size turd and while the log is exiting your cornhole the bastard decides to break in half. After this you have to wipe your ass 30 times to get rid off all the fecal matter.
A girl who isn't bothered about who or what goes inside her, as long as you use her correct name
"I was with a girl last night who let me put three lion bars in her arse and a Thomas the Tank Engine toy in her minge. I had to keep using her name though, she was right dirty Michaela"