Bun in the Oven 

Pregnant. The idiom bun in the oven refers to pregnancy. The “bun” is the baby, and the “oven” is the mother's womb. Perhaps it alludes to the warmth and shelter the mother's womb provides.

Teacher: "Kids, I have a Bun in the Oven"
Kids: "YAY, I WANT A BUN! GIMME"
Teacher: "I'm Pregnant."
Kids: "AW I WANTED BUNS!"

Bun in the Oven by The Internet Is Porn December 18, 2019

Cat's in the oven 

A term used when you need to escape from a person you don't want to talk to. Usually leaves them confused, which allows enough time to leave while they work out what you just told them.

Dude, Bob wouldn't shut the hell up, so i told him i had to go because my cat's in the oven

Cat's in the oven by Noah_The_Arkman January 26, 2011

a bun in the oven

to be pregnant .

I hear Wendy's got a bun in the oven.

a bun in the oven by ubi1216 February 11, 2015

the chicken is in the oven 

The chicken is in the oven is a joke made by Swedish game developer rob top. At first people thought it was a hint that 2.1 was coming soon but nope it came months after.

Rob top posted the joke the chicken is in the oven

the chicken is in the oven by incylix October 26, 2020

one in the oven 

a woman who is pregant

tracy that silly old sour faced tart shes got one in the oven

one in the oven by grumpyboy September 26, 2005

unknown in the oven 

when a girl is pregnant with the love child of unknown, a notorious message board poster

Hey, you heard Picc's pregnancy test was positive? She must have an unknown in the oven.

unknown in the oven by Hugh Jazzzzz January 19, 2008

Plums in the oven 

A sexual act wherein a man places his testicles inside a woman's vagina.

*over heard from two builders*

"I was shagging the wife last night, and my heart wasn't really in it. All of a sudden I realised that I had my Plums in the oven."
"What did you do?"
"I retrieved them, didn't I."

Plums in the oven by Plummy Mummy July 13, 2010