Depending on the context, “ketchup” is a mass noun – any quantity of it is treated as an undifferentiated unit, rather than something with discrete subsets. If you take a puddle of ketchup and split it in half, you have two puddles, not two ketchups. Are puddles differentiated while they are actually ketchup?

There are certain rarer cases where it is okay to say what you did.

• What kinds of ketchup do people like, and they show it off and what type they give you? Could it be a part of a conversation that would have more immediate effect, and would require “Give me ketchup”?
• How are small packages of ketchup used? In any case, it would be informal but not too odd, if there were a known context that indicated you meant “Give me a ketchup packet.” Why

is your Coke sample complicated by the number of ways that beverages can be served. What can any certain word that is implied in reality?

• How much Coke do I have? ” – The container is implied; it could be a glass, bottle, or can. When you are being direct to someone you want, they want only one container full. If only one container is empty, do they actually want both containers?
• What is the best way for me to have Coke? ” – The quantity and container are implied. If I drank straight from the soda fountain?
• Is there any legal reason to ask for Coke in glass?
• What are the benefits of having coke? If what is the same as some, the sign is “some..”

Why are governments so cruel and inefficacious?

For example, your particular example is a simile combined with a bit of alliteration. Is he as handsome as hell and hot? A persons name ‘hot’ alone is used to refer to a physically attractive person (sitting person, that is that person)?

The rest of the lyric plays with the idea that hell is where sinners go, but sin can be fun.

Then it’s perfect for a casual language. To some people, “hell” is considered profanity, so it is not always appropriate.