Mature Cheddar 

Mature cheddar is slang for "old money". If somebody inherited their fortune, they are classed as mature cheddar.

“How did you manage to buy half of Switzerland and a Gucci handbag?”
“I'm mature cheddar.”

Mature Cheddar by C L G July 4, 2021

mature cheddar head 

A mature cheddar head is someone who is very mature but acts really stubborn and stuck-up with it, quite snobby. They are mature in a really boring way with no sense of humour and take everything seriously.

'Sophie told me making fart noises is immature.'
'Don't worry, she's a mature cheddar head with no sense of humour.'

mature cheddar head by mousey1306 June 16, 2012

Extra Mature Cheddar

Extra Mature Cheddar refers to 'old money' that has been in a family for a minimum of 6 years. If somebody's ancestors inherited the family fortune, they're classed as an extra mature cheddar family.

“How do all of his relatives own 6 Lamborghinis and 2 islands?”
“He's extra mature cheddar.”

Extra Mature Cheddar by C L G July 4, 2021

Mature like chedder cheese 

A phrase meaning 'even more mature than normal' .It can also be a way to discribe people who are really imature as in:YOUR ABOUT AS MATURE AS CHEDDER CHEESE!!

"Hi bob"

"Hi jim"

"your mature like chedder cheese"

"thanks "

Mature like chedder cheese by bobmcbobbill May 20, 2009