Fun sponge 

Noun. A boring, humourless person.

Who was that boring prat you were with yesterday? He was a real fun sponge!

Fun sponge by Dick Wright-Upham December 7, 2010

Fun Sponge 

The character Freddie Mclair from the television show Skins.

Cook: And why didn't we invite Freddie?
JJ: Cause he's a Fun Sponge
Cook: You got it

Fun Sponge by seemejudgingyou September 8, 2009

fun sponge 

Someone who has the ability to walk into a room and litteraly soak all of the fun out of it. Also known as a muzz.

"Nick was such a fun sponge, the moment he arrived the party died."

fun sponge by Doc Raymond October 10, 2003

Fun sponge 

A person or group of people, who take an activity so seriously and or literally, that they squeeze every last drop of joy out of it.

Can be appropriately applied to cyclists who spend 10K+ on their bikes, clearly don't enjoy what they're doing and live for looking down on those with 'lesser' equipment.

"Did you see those Joe Serious bellends shaking their heads and tutting?"

"yeah, fun sponges every last fuckin' one of 'em"

Fun sponge by Itsallgoodman May 17, 2016

Fun Sponge 

A fun sucker, downer, negitive nacy party pooper or a downright joy killington.

Person 1: Man, lets go on a killer adventure!
Person 2: (AKA Fun sponge) Naw, im kinda tired. Plus adventures are for losers.

Fun Sponge by Simple Jack and a sack March 24, 2009

Fun Sponge 

A person or group of persons who have the uncanny ability to absorb all of the fun out of something, not unlike a sponge...

Person 1: I say its such a wonderful day, shall we partake in a light spot of fornicating the establishment...
Mikeey: No..... *Sound of fun absorbtion fills the air*
Person 1: You sir are such a FUN SPONGE...

Fun Sponge by Edmund Black Adderz May 29, 2009

Fun Sponge 

Someone who stops everyone else having fun

*Beth and Aamy were giggling *
Justin: Stop being so immature
Beth: Well stop being such a fun sponge then.

Fun Sponge by Nikki Crapper June 5, 2009