fraternity leave 

When you miss work due to your partying the night before, much like a parent misses work for the birth of their baby.

After last night, Steve was so hungover that he needed to take a fraternity leave

fraternity leave by 4qmmt January 28, 2010

Fraternity Leave 

Taking off from work so you can go to a frat party or missing work to go to a frat party.

Boss: So why can't you come in tonight?
Bro: Crazy rager tonight, im going on fraternity leave.

Fraternity Leave by octivemelody May 30, 2018

Graternity Leave

When grandparents take time off of work for a new grandbaby. This could be for the visiting the new parents, babysitting the older child(ren) while new baby is being born, helping the parents with the new baby......

There's maternity leave, paternity leave and now we have graternity leave.

Dear Boss ~ I will be taking 3 days graternity leave to help with the new grandbaby.

Graternity Leave by LNG November 9, 2011

Furternity Leave

When you take time off work to be with your new puppy

"OMG! Did you hear about Jessi? She took three weeks Furternity Leave to be with her new small batch, artisan made, non-GMO, free range, gluten free Yorkiepoo!"

Furternity Leave by kwillhoite July 13, 2016

Faternity leave

A period of maternity leave, unexpected by friends and co-workers as nobody knew the Mother to be was expecting, due to her already substantial build.

Where's Kate been these past few weeks, Dave?

She's on faternity leave with the bairn.

I didn't even know she was pregnant...She was already a big girl though.

Aye, fraternity leave, right enough.

Faternity leave by Bayesoir December 31, 2019