that's why

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that's why

Used after a statement to emphasize the reason or explanation just given, especially in response to a statement or question using the word "why." A: "Why can't I go to the party with my friends?" B: "Because you have a huge test on Monday that you need to study for, that's why!" A: "I don't understand why we need to learn this stuff." B: "Because it will be useful to you for the rest of your life, that's why."
See also: why

that's why

a tag on the end of a statement that is an answer to a question beginning with why. (Shows a little impatience.) Sue: Why do you always put your right shoe on first? Bob: Because, when I get ready to put on my shoes, I always pick up the right one first, that's why! Mary: Why do you eat that awful peppermint candy? Tom: Because I like it, that's why!
See also: why
References in periodicals archive ?
Perhaps, in part, that is why we are here to teach.
That is why the European Union's success is America's success, and that is why we Americans stand second to none in claiming our right to celebrate with you this afternoon.
That is why it is entirely appropriate that married people enjoy special social standing.
That is why all of us who work in the pyramid honor the hierarchy and always do what the people above us say."
I suppose that is why my male colleague could not find anything wrong with 'Gladiator' and was astonished that I thought otherwise." She points out that the movie's elaborate killings generated the most audience approval, expressed in the form of "excited bellows." "This was especially true with the men seated behind me exclaiming with laughter every time a gladiator was sliced in two or dismembered." (3)
To me, that is why this book is important--because it addresses issues, however painful and tragic they may be, that most of America can relate to.
That is why it is so important not only to have excellent treatment but also to try to get back the immune defense, because there you have a natural defense that takes place everywhere.
That is why I am afraid." That's not irrational, that's dialogue.
I am interested in the space of the ocean - as an I-land dweller, I am interested in the ocean that is around the I-land - but the page is the movie screen, in that the third meaning of the page, of writing, for me, is the page that I roll into the typewriter, and that is why I said movie reels.
That is why it is so important to enact legislation that would remove the artificial barriers that are impeding the profitability of banking.
We always experience shame in relation to someone; that is why, instead of dilating on religious concepts, I am obliged to make an effort to picture the faces of people before whom I am ashamed.
That is why Merton, as great a figure that ever lived in the American church, saw no contradiction between the austerity of his monastic life and his love for poetry, art, a few cold beers at a summer picnic, and a solitary dance as he listened to the music of Bob Dylan in his hermitage.
I can step outside of heterosexuality but it is not as easy to step outside of masculinity, and that is why I am trying to divide this sentence into several boxes; that seems the best way to deprive it of familiarity.
Maybe that is why God does not allow us to see Him or make images of Him.
When Slavoj Zizek says, "There is no social relation," we react as cynics and Kantian fetishists: I know very well there is no social Harmony prepared in heaven, but that is why we must work it here on earth.