and you dont seem to understand 

And you don't seem to understand
A shame you seemed an honest man
And all the fears you hold so dear
Will turn to whisper in your ear
And you know what they say might hurt you
And you know that it means so much
And you don't even feel a thing
I am falling, I am fading,
I have lost it all
And you don't seem the lying kind
A shame that I can read your mind
And all the things that I read there
Candle-lit smile that we both share
And you know I don't mean to hurt you
But you know that it means so much
And you don't even feel a thing
I am falling, I am fading, I am drowning,
Help me to breathe
I am hurting, I have lost it all
I am losing
Help me to breathe

aka the lyrics in the hit anime show serial experiments lain about a girl whos gay going into COMPUTER WORLD

person 1: and you dont seem to understand
person 2: bro... are you lainpilled??
person 1: yea

person 1 and 2 now have a very hot makeout session

and you dont seem to understand by based and lainpilled July 11, 2021

And you know this man! 

Chris Tucker's (Smokey's) catchphrase used occasionally in 1995 Comedy-Drama movie 'Friday' starring alongside rapper, actor and film director Ice cube (Craig)

Smokey (Chris Tucker) on the phone to Big Worm (Faizon Love):

"Well, yeah. I got your money anyway,and you sell that shit yourself next time cause I'm going to rehab. I'm through with this shit."

**HANGS PHONE UP**

Smokey (Chris Tucker) Rolls up some weed and starts to smoke and says to the camera:

"I was just bullshittin', And you know this man!"

And you know this man! by ???Anon??? December 31, 2007

And you know I’m serious because I said The World and not ZAWARUDO

“And you know I’m serious because I said The World and not ZAWARUDO” is a phrase commonly used by Lord Nuxanor after making a serious statement with the words “The World” in the statement as apposed to the usual use of the world which is correctly pronounced as ZAWARUDO while flexing epically on all the normies because you gotta stay cool fam.

“We must end poverty across The World, And you know I’m serious because I said The World and not ZAWARUDO”

And you know I’m serious because I said The World and not ZAWARUDO by CoochieFister666 December 2, 2019

...And You Will Know Us by the Trail of Dead

a rock band from Texas
often simply called "Trail of Dead"
a very good band and in my opinion the hope of alternative rock, a genre that suffered so much in the past few years.
they got everything: musical talent and the jolly good ambitions to bring variety into every album, cool lyrics, stylish artworks and on stage they simply ROCK! make sure to be there if they are around for a show.

i simply like ...And You Will Know Us by the Trail of Dead - although first i thought they play some emo crap. but then i listened to them!

...And You Will Know Us by the Trail of Dead by sgrDD March 20, 2008

and you know this

The same kinda thing as 'i know, right?', or 'hell yea'.

danielle: damn that shirts hella tight on u girl
amanda: and you know this!

and you know this by Angelacia September 19, 2007

And you know this man! 

The definite truth when speaking or talking

"...and you know this man" as BoogieWonder high fived his partner in da club

And you know this man! by Getrich83 December 13, 2003

and you're not 

A verbal banter phrase that follows up a declaration one of your friends makes. Popular in the San Francisco Bay Area. Often followed up by "Aren't we all?"

Noah: This show is so lame.
Eric: And you're not?
Andrew: Aren't we all?

and you're not by EricGoldberg June 24, 2006