cat's tongue 

If you don't handle hot (NOT SPICY, the temperature) food or drink well, and you have to let it cool before you try it.

It came from a literal translation of the Japanese word 'Nekojita' (猫舌), which is used to describe someone who can't handle (piping) hot food or drink.

"Is there something wrong with your soup? Do you want something else?"
"Oh no I haven't tried it yet, I'm letting it cool first."
"Oh, so you have a cat's tongue, got it."

cat's tongue by BYOOP May 28, 2017

cat's tongue 

A dislike of hot or spicy foods.

"Want any Tabasco?"
"No, cannot stand the stuff, I have a cat's tongue."

cat's tongue by Matt Green September 12, 2008

As rough as a cat's tongue 

To feel unwell following an overindulgence of alcohol.

I feel as rough as a cat's tongue!

As rough as a cat's tongue by El Carter December 18, 2008

cats tongue 

It refers directly to the texture of genital herpes. But it is more commonly used as just the alternative for the words: genital herpes, or more generically, for just herpes.

As known as having kitty lips. Which is a direct reference to a woman having herpes in the genital area.

"Dude check out the girl over there"

-"Yeah, she's hot, too bad shes got the cats tongue."

"Really?"

-"Yeah dude, kitty lips."

"Ugh, my luck."

-- cats tongue

cats tongue by PACBROWN November 5, 2010