That's not how I dress 

I don't adhere to those rules, I don't act like that, or I'm not okay with that.

Marcus posted some blue lives matter thing on his wall, so I unfollowed him because that's not how I dress.

That's not how I dress by Reya Kalel August 4, 2019

That's not a good sound... 

phrase used by Dr Horrible and can be used when an unexpected sound occurs

'Car backfires'

you: " that's not a good sound..."

That's not a good sound... by Death Knight Mordakai February 4, 2010

that's not what your mother said last night 

similar to that's the sound your mother made last night. it also originated from SNL celebrity jeopardy. it was said by Sean Connery and is just another sexual innuendo.

Sean Connery: It's been a long time, Trebek.
Trebek: Not long enough.
Sean Connery: That's not what your mother said last night!

that's not what your mother said last night by gorillaguy987 May 23, 2009

That's not you 

To tell a person that what they're saying or doing is so unlike what they usually do or what they are. Not typical of one's known traits or behaviour patterns.
Eg., A Robin Hood in modern times, a celibate madam of the house, and finally, a priest who doesn't ask for money.

Bob : "I have a bottle or two every night...of soda."
Rob : " That's not you, mon!"
Bob: " ... And whatever else that goes with it. Rum, when it's windy , vodka, when it's not."

That's not you by sanaryamni October 27, 2014

That's Not Sexy

Something One Types into Google and presses I'm Feeling Lucky to see some pictures. Advised By ImageChan after page 13 which states "go ahead see what happens and you'll thank me later". Don't go if you value your eyesight.

"Hey Type In 'That's not sexy" in google and press I'm feeling Lucky you'll thank me later"
"Ok lets see...OH GOD MY EYES!"

That's Not Sexy by One Who Lost His Eyes March 25, 2010

That's not gravy 

Ironic, mood-lightening expression to be used upon bearing witness to an unpleasant shitstain or skidmark.

A prison guard examines an inmate's bed, peeling back the covers to reveal a large brown stain of fecal matter plastered over the sheets. To bring humour and gravitas to the discovery he remarks, "That's not gravy." (As seen on the television documentary 'Strangeways'.)

That's not gravy by AngeloComet June 12, 2011