Sheffield University has carried out a study on regional insults across Britain, revealing that most of them are not just outdated but make you sound like you've just stepped out of a 90s sitcom. Here's a rundown of these colorful terms, ranked by their increasing lack of bite.

North West: pillock
A classic but tired term for a stupid person, 'pillock' is like a dusty relic from Last of the Summer Wine. Use at your own risk if you want to avoid sounding like a comedy Northerner.

Yorkshire: minger
Once the go-to for describing an unattractive person, 'minger' is now as passé as a 90s boy band comeback. Apologies to all teenage girls out there—it’s not you, it’s the word.

Cumbria: mayglem
This mysterious term for 'simpleton' is so rare, it's practically an enigma wrapped in a puzzle. Your guess is as good as ours.

Midlands: daft apeth
Sounding like something straight from a Dickens novel, this term for a 'foolish person' will either make you sound gritty and authentic or just like someone who needs to stop talking about 'cobs'.

Scotland: numpty
Popularized by Billy Connolly, this term for a dimwit is now an ancient relic from the 90s. It’s as trendy as discussing last night's episode of This Life at the office water cooler.

Manchester: bobbins
Calling something 'bobbins' is like saying it's rubbish but not in a memorable way. Leave this one to Peter Kay, unless you're also a stand-up comedian.

Scotland: glaikit
Meaning 'vacant', this Scottishism is more likely to baffle than amuse. Why not just say 'vacant' and save everyone the confusion?

Portsmouth: dinlo
Go ahead, use this obscure term for 'idiot' and watch people nod politely while making a mental note to steer clear of you in the future.

London: muppet
Once a popular London insult for someone foolish, 'muppet' is now more associated with Danny Dyer and Gordon Ramsay, making it hard to use without sounding like a bit of a twat.

Nottingham: mardy git
This term for someone moody or sulky will make you sound like you skipped university in favor of a pie-based diet. Not that there's anything wrong with pies.

Yorkshire: wazzock
Using this dated term for 'idiot' in a professional setting is the quickest way to sound like you’re auditioning for a regional panto.