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->''"Haw-haha, here's the problem, too many toasters! You know what they say: [[BlatantLies All toasters toast toast!]]"'' [[note]][[WesternAnimation/EdEddNEddy Toast doesn't go in a toaster, bread does.]][[/note]]
-->-- '''{{Mario}}''', ''VideoGame/HotelMario''

A StockPhrase.

->"You know what they say: [insert witty, important, or nonsensical proverb here]"

When referring to a specific group, refer to YouKnowWhatTheySayAboutX

When the character refers to himself saying something, regardless of whether or not he actually does in the series, the trope is ItsLikeIAlwaysSay.

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!!Examples:

[[foldercontrol]]

[[folder: Comic Books ]]

* In the "Torn" arc of Creator/JossWhedon's ''[[ComicBook/{{X-Men}} Astonishing X-Men]]'' run:
-->'''Emma''': Well, you know what they say-- ''(Kitty abruptly pulls her through the floor)'' Aah!\\
'''Kitty''': "Aah"? They say "aah"? [[YouFightLikeACow You are pathetic]].

[[/folder]]

[[folder:Film]]

* ''Film/TheBoondockSaints''
-->'''Doc:''' You know what they say: People in glass houses sink sh-sh-ships.
* ''{{Shooter}}''
-->'''Jack Payne:''' You know what they say is the first thing that a man feels when he shoots a civilian?
* ''TheDevilWearsPrada''
-->'''Nigel:''' You know what they say. Tiny man. Huge ego.
* In ''Film/CannibalTheMusical'', there was a scene where the town's drunken sheriff informs Packer that he's going to be hung at sunrise, then adds "You know what they say about sunrise?", awkwardly pauses for a moment, and just wanders off. According to the commentary, the actor (who actually was drunk) had just forgotten his line and walked off camera - Trey Parker opted to leave it in because he decided that it was [[ThrowItIn funnier than the actual punchline.]]
* In ''Film/TheRoom'' :
--> '''Johnny:''' You know what they say: love is blind.
** Anyway, how is your sex life ?
* In ''{{Film/Airplane}}'' :
--> '''First Jive Dude:''' Hey, you know what they say: see a broad to get dat booty yak 'em...
--> '''First Jive Dude, Second Jive Dude:''' ...leg 'er down a smack 'em yak 'em!

[[/folder]]

[[folder:Music]]

* LadyGaga's video for "Telephone": "You know what they say: Once you kill a cow, you gotta make a burger."
* Mika's "Lollipop"
-->"I was walkin' with my mama one day, when she warned me what people say: Live your life until love is found, or love's gonna get you down."
* Rebecca Lynn Howard's "Forgive": "You know what they say / Forgive and forget, re-live and regret."

[[/folder]]

[[folder:Literature]]

* Deconstructed a couple of times in ''Discworld'' novels, with both Sam Vimes in ''Discworld/FeetOfClay'' and William de Worde in ''Discworld/TheTruth'' wondering who "they" actually ''are'', and why anyone should listen to them.

[[/folder]]

[[folder: Live Action TV ]]

* ''TheOffice''
** "Traveling Salesmen"
--->'''Michael Scott:''' You know what they say. Fool me once? Strike one. Fool me twice? Strike three.
* ''TwoAndAHalfMen'' episode "Shoes, Hats, Pickle Jar Lids"
-->'''Courtney:''' You know what they say: when you assume... you're just a bitch.
* ''Series/{{NCIS}}'' has two variations on the YouCantMakeAnOmelette saying:
-->'''Leroy Jethro Gibbs:''' Well you know what they say, Jen. Can't make an omelette unless you break a few eggs.
--->--"Under Covers"
-->'''Officer Ziva David:''' [[BluntMetaphorsTrauma Well, you know what they say. You cannot make an omelette without breaking a few legs.]]
--->--"Knockout"
* ''{{Smallville}}'' episode "Leech":
-->'''Jonathan Kent:''' You know what they say: Lightning never strikes twice in the same place.
* ''{{Friends}}'':
-->'''Chandler:''' You know what they say, ask your slippers a question...you're going crazy.
* ''Series/BuffyTheVampireSlayer'' episode "Blood Ties"
-->'''Willow Rosenberg:''' Well, you know what they say: The bigger they are...\\
'''Anya:''' The faster they stomp you into nothing.
* ''GilmoreGirls'' episode "Lost and Found":
-->'''Lorelai:''' You know what they say.\\
'''Luke:''' No, what do they say?\\
'''Lorelai:''' Never ever date a guy who owns a single bed...it means he's not open to a commitment.
* ''TheGoldenGirls:'' "You know what they say: you can lead a herring to water, but you have to walk really fast or he'll die."
* ''That70sShow'' episode "Bye Bye Basement"
-->'''Leo:''' You know what they say, Rome was built in a day.
* ''TheWire'' episode "Game Day"
-->'''Det. James 'Jimmy' [=McNulty=]:''' Well, you know what they say: "Stupid criminals make stupid cops."
* ''CSINewYork'' really likes this one.
** "Zoo York"
--->'''Dr. Evan Zao:''' You know what they say: It's a dirty job but...\\
'''Det. Lindsay Monroe:''' The rookie's gotta do it.
** "The Box"
--->'''Reggie Dunham:''' You know what they say, right? Mind's a terrible thing to waste.
** "The Party's Over"
--->'''Detective Mac Taylor:''' You know what they say: keep your friends close and your enemies closer - and if that doesn't work, kill 'em.
* ''CSIMiami''
-->'''Horatio Caine:''' You know what they say. You lie down with the Devil, you wake up in Hell.
** On another episode:
-->'''Caine:''' You know what they say, Frank (puts on sunglasses)...speed kills.
-->''[[MemeticMutation YEEEEEEAAAAAAAAAA--]]''
* ''HannahMontana'' episode "Miley, Get Your Gum"
-->'''Robbie Stewart:''' You know what they say, every now and then even a blind pig snorts up a truffle.
* ''Series/TheSopranos'' episode "Cold Cuts"
-->'''Anthony 'Tony' Soprano Sr.:''' You know what they say: Revenge is like serving cold cuts.
* ''Series/{{Angel}}''
** "Heartthrob"
-->'''Darla:''' Well, you know what they say... life's full of surprises.
* ''Series/BurnNotice:'' "Yeah well, you know what they say about holding a snake by the tail, Mike."
* ''PrisonBreak:'' "You know what they say about weather in the midwest: if you don't like it, wait an hour."
* Played with on ''SportsNight'':
-->'''Dan:''' You know what they say.
-->'''Casey:''' About what?
-->'''Dan:''' About money won.
-->'''Casey:''' What do they say?
-->'''Dan:''' I don't know. I'm asking.
-->'''Casey:''' They say it's twice as sweet as money earned.
-->'''Dan:''' How come you said 'what do they say'?
-->'''Casey:''' It was an alley-oop pass.I was dishing you the ball.
-->'''Dan:''' You were. And I completely missed it.
-->'''Casey:''' I was there for the putback.
-->'''Dan:''' I wouldn't have been able to do anything with it anyway.
-->'''Casey:''' That's right.
-->'''Dan:''' Because I didn't know the expression.
[[/folder]]

[[folder:Video Games]]
* ''VideoGame/HotelMario'' does this in the second hotel when Mario stumbles upon a room full of toasters that have been causing blackouts in the entire hotel, to which he comments, "You know what they say... All toasters toast toast!" before unplugging them.
* ''ShadowTheHedgehog'' has the Egg Breaker boss fight (Eggman in a MiniMecha). The version of this boss fought in the Mad Matrix level is a FlunkyBoss who says "You know what they say! The more, the merrier!" when he uses his EnemySummoner attack. Every time he uses it. And he often uses it many times in succession. [[MostAnnoyingSound You can probably guess players' reaction to this..]]
[[/folder]]

[[folder:Webcomics]]
* [[http://www.girlgeniusonline.com/comic.php?date=20050808 Played with]] in ''Webcomic/GirlGenius''.
[[/folder]]

[[folder:Western Animation]]
* Parodied in an episode of ''WesternAnimation/EdEddNEddy'': Edd and Eddy are discussing some problem, and [[CloudCuckooLander Ed]], who was not involved in the conversation, chimes in with "You know what they say," and then immediately goes back to poking around in his locker, ignoring the other two. An awkward pause ensues for a few seconds while they wait for him to finish.
* ''TheSimpsons''
-->'''Homer:''' You know what they say sometimes you have to break the rules to free your heart.
* ''WesternAnimation/PhineasAndFerb''
-->'''Roger Doofensmirtz''': You know what they say, "You can't be T'd off once you've T'd off'." Heheh...that was very funny...
-->'''Heinz Doofensmirtz''': What?? Who says that?
-->'''Roger Doofensmirtz''': You know, They. Those guys over there. *points to a pair of CreepyTwins saying "You can't be T'd off once you've T'd off".* "Creepy, right? I've been trying to ditch those guys all day!"
** Bonus? Their names are actually They.
** Doofenshmirtz did it once.
-->'''Heinz''': You know what they say about Taking the easy way.
-->'''Vannesa''': What do they say?
-->'''Heinz''': I could tell you, but that would be taking the easy way [[ShapedLikeItself and you know what they say about that.]]

[[/folder]]

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