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A Boy Band that were runners up in the X factor. They are popular among pre teen girls and like to take their shirts off. Despite their entire fanbase being under the age of 12 they still like to sing about sex and how they all like Penis.

They also have random colour schemes of green, yellow, blue and red so anyone wearing one of their hoodies looks like a teletubby.

Despite this they have had 3 UK number ones and a rabid fanbase of tweens and their mothers who think they are the Chippendales
"I look so cool in my JLS Hoodie that Tinky Winky might come and play with me."

"I went to a JLS concert and I nearly got eaten by a pack of 10 year olds!!!"
by LawrieCrash August 12, 2010
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A bunch of twats who call their music 'RnB' when really it's just badly disguised chav pop. Everyone things they're well fit. They're not and they regularly involve themselves in various sexual activities with each other.
"I love JLS"
by GothicDuck April 26, 2010
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Initials standing for Jack the Lad Swing, used for the crappy boyband that is the bratty little love child of the X factor, a UK singing show. The 4 boys involved are only famous because pre teen girls fancy them all and dream of marrying them, not due to any real musical ability or singing talent. They spend their time bringing out condoms with their names on the to make sure teens 'Just Love Safe' not actually writing meaningful lyrics of their own. For example their lyrics to the song 'Everybody in love'-
Every minutes like an hour,
Every hours like a day,
Every day lasts forever,
Iโ€™d wait forever and a day for you.
According to their system they'd wait for an hour and a day for their girlfriend and then bugger off.
Jenny: OMG I love JLS! I'm seeing them in concert.
Alice: Shut up, you wouldn't like them if you didn't think they were fit. They can't sing anyway.
by teenspirtit December 06, 2010
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Acronym meaning "Jigaboo Lipped Sambos".

The term comes from a group which featured in the popular X-Factor series which is broadcasted in the UK.
Person 1: "What does JLS stand for?"
Person 2: "That's easy, it's Jigaboo Lipped Sambos"
by Stanley555 January 14, 2009
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Jack the Lad Swing. A band which appeared on X-Factor 2008 and came second. They should have won because they were so much better than Alexandra! The main singer, Aston Merrygold is beautiful.
Hannah: "X-Factor final is on this saturday, who are you going to vote for??"
DeeDee: "JLS obviously, they are the best."
by DeeDeeMerrygold February 16, 2009
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Jealous lover syndrome- this is when you get jealous of that someone claims your best friend as their best friend, when you are jealous that your best friend is hanging out with someone and you can't be there, when someone you don't like hangs out with you best friend or signifcant other or when you are jealous of your significant other talking to the opposite sex.
"I had I bad case of JLS when I saw Becky was hanging out and having fun with Danielle at a bonfire and I couldn't be there."
"I got JLS when I saw Ben talking to that cute blonde."
by b'n young February 13, 2015
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Four Boys Created By
Oritse Williams!

JLS Stands For Jack Lad Swing
In The Group
Aston Merrygold=NOM!
Marvin Humes=ooft
Oritse Williams= ILOVEYOU Owner Of The Group!

Saw You In Concert!
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