A catamaran doesn’t contain any meringue, but there’s a riddle:
 
Q: What is white, sugary, has whiskers and floats on the sea?
A: A catameringue.
 
The “catameringue” pun has been cited in print since at least 2002.
 
           
Wikipedia: Catamaran
A catamaran (/ˌkætəməˈræn/) (informally, a “cat”) is a multi-hulled watercraft featuring two parallel hulls of equal size. It is a geometry-stabilized craft, deriving its stability from its wide beam, rather than from a ballasted keel as with a monohull sailboat. Catamaran is from a Tamil word “Kattumaram” which means logs tied together.
 
Catamarans typically have less hull volume, higher displacement, and shallower draft (draught) than monohulls of comparable length.
 
Wikipedia: Meringue
Meringue (/məˈræŋ/, mə-RANG; French pronunciation: ​[məʁɛ̃ɡ]) is a type of dessert, often associated with French, Swiss, and Italian cuisine, traditionally made from whipped egg whites and sugar, and occasionally an acidic ingredient such as lemon, vinegar or cream of tartar. A binding agent such as salt, cornstarch or gelatin may also be added to the eggs. The key to the formation of a good meringue is the formation of stiff peaks by denaturing the protein ovalbumin (a protein in the egg whites) via mechanical shear. Meringues are often flavoured with vanilla, a small amount of almond, or coconut, although if extracts of these are used and are based on an oil infusion, an excess of fat from the oil may inhibit the egg whites from forming a foam.
 
They are light, airy and sweet confections. Homemade meringues are often chewy and soft with a crisp exterior, while many commercial meringues are crisp throughout.
     
Google Books
Over 1500 Fantastic Jokes
By Guy Campbell and Paul Moran
London, UK: Dean
2002
Pg. 75:
What is white, sugary, has whiskers and floats?
A catameringue!
 
Google Groups: alt.tv.big-brother
UK - Anothe Jade Classic      
Kat
6/17/02
In message , Douglas Ellison
writes
>
>“Beck” wrote in message
>news:aekhts$khj$1@helle.btinternet.com…
>>
>> “>Kat<" wrote in message
>> news:h$d5PzI9bcD9Ewzg@purplehaze.freeserve.co.uk…
>> > In message , Douglas Ellison
>> >

writes
>> > >Christ she’s pig-thick.
>> > >
>> > >She’s been sailing on a CataMeringue you know.
>> >
>> > She should give them a miss; they’re full of sugar….
>>
>> and eggs.  Too much eggs can be bad for you.
>
>eggs and sugar are never going to float
 
Egg white and air…. sugar to hold it together.. a good thick coating of yacht varnish…
Voila!
Catameringue!
 
Twitter
weenick‏
@weenick
What is white, sugary, has whiskers and floats on the sea ? A catameringue…(apologies)
5:13 AM - 14 Jun 2009
         
Google Books
The Mammoth Book of Really Silly Jokes:
Humour for the whole family
By Geoff Tibballs
London, UK: Constable & Robinson Ltd
2011
Pg. ?:
What is white, sugary, has whiskers and floats on the sea?
A catameringue.
 
Google Books
Sensible Nonsense.. Frank’s Comic Pack:
Humour Pack Series
By Frank Paul
BookBaby
2014
Pg. ?:
“What is white, sugary, has whiskers and floats on the sea ?A catameringue !”
 
24 February 2016, Herald Express, (Torquay, UK), “Jokes,” pg. 11:
What is white, sugary, has whiskers and floats on the sea? A catameringue!
 
Twitter
Jamie ⚔️‏
@trequartbeasta
What’s made of egg and floats on water?
A catameringue.
1:27 PM - 2 Dec 2017
 
Twitter
🏇MARK‏
@westy2112
What’s white,  sweet, has little ears and whiskers and floats on the ocean?
A catameringue
#BadJokeFriday
11:10 PM - 18 Jan 2018
 
Twitter
Lucky Score‏
@LuckyScoreNet
What is white, sugary, has whiskers and floats on
the sea ?
A catameringue !
#Joke from #CatJokes in #Jokes, #Humor and #Satire
9:38 AM - 29 Jan 2018