What is Abstraction in OOP?

There is a video in the above address. Here it is on YouTube at :40.

Some of the information that would be useful would be

  • Full Name
  • Address
  • ...
  • Favorite Band

and I am sure you are wondering what the heck I am talking about.

Then there is a character with "WTF" written over his head. enter image description here

What does "WTF" mean in that video? I found that "wtf" stands for "what the fuck", but I can't understand what does "what the fuck" mean? and I want to know what phrase I can use instead of "what the fuck" because I don't like to use unpleasant words.

I would also like some simple examples of using "what the fuck?". In this way I think I can understand the meaning of that rude phrase better.


Interjections like what the X and what on X are expressions of surprise or confusion, frustration or anger, resignation or nonchalance. The intensity more or less correlates to that of the key word.

As for the character in the video, I would paraphrase his thought as either:

I don't understand! Why do I need to give all this information?!


I'm being asked to do too much!

His face suggests anger, but the context and the narrator's next comment address his confusion. Notice, by the way, that the narrator softens the "WTF" in a very predictable way:

You're probably wondering what the heck I'm talking about.

There are lots of ways to soften such expressions. Actually, WTF, although not easy to use in spoken conversation or likely to be understood by older speakers, is already softer than spelling it out.

Here are some more variations — a small selection of the many available.

→ What the heck? Didn't I lock that cow in her pen?
=Surprise. Quite tame.

→ What the hell, Richard! I thought I told you to stay out of this!
=Anger, indignation.

→ What the devil? Why, that's my briefcase in the hands of a street urchin! Catch him!
=Confusion and panic. Older British language.

→ What in the Sam Hill is that big shape on the horizon?
=Confusion. Certain US states.

→ What the hey! I guess it doesn't matter whether we hold the party on Saturday or Sunday.
=Nonchalance. Older US usage, very tame.

→ What on God's green earth are these lawyers asking us to do?

→ What the f---! They scheduled three exams on Monday? FML.
=Anger, bewilderment.

One of my favourites, actually, is to simply omit the X altogether. The stress then falls on "what".

What the! Scaramucci is already out?

  • 4
    Omitting the X altogether is one of my sister's favourites too, with the result that her kids use the same phrase, but as far as I can tell they think the whole phrase is "What the?" and don't realise that anything has been omitted. – AndyT Aug 9 '17 at 14:29
  • 1
    @AndyT Similarly, I tend to exclaim "Piece of!" and recently realized that I'm not sure anyone's filling in the blank. – Luke Sawczak Dec 21 '17 at 5:08
  • 2
    @AndyT I once saw a kid text, "wtf? (Don't worry, mom. The "f" is short for "flip".)" :-) – godel9 Apr 7 '18 at 14:15

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