A alleged medical condition that father-in-laws come down with to get out of work A condition that is only found and used when you are too lazy to go to work. People who use this excuse are usually lazy, grizzled, and have a suspended license.
"Yeah man I can't make it into work today. My father-in-law has herbaculosis and it is looking pretty serious. I have to stay home for the next two days and take care of him."