fuck my hat, I didn't know that 

Rhyming expression for use when you really didn't know something, and were maybe even the last person on earth to find out. Goes to show you really do learn something new every day.

'You mean you can't get pregnant by sharing a facecloth? Fuck my hat, I didn't know that!'

fuck my hat, I didn't know that by mockschmock December 9, 2006

just so you know

just want to let you know

just so you know, you are actually ugly like hell

just so you know by you&me June 3, 2006

If you know, you know 

The defining phrase of an inside joke/access to information only a select few know about

You see your mate's laptop screen saver is a naked girl, but her face is covered , you know who it is, but others don't- you post it on your snapchat and put "....'s screensaver, if you know, you know"

If you know, you know by Resting peace October 11, 2015

Now you know 

Also known as nyk. The full phrase is 'Now you know better than that'. When someone says or does something so ridiculous, stupid, hilarious, or outrageous, the proper response to the situation is simple: "Now you know." nyk can be used in the place of lol for when you just don't know how to respond.

Dumb Bitch: I dropped $5 at Starbucks and $8 at Panera. The perfect breakfast!
Intelligent Person: Now you know.

Future Dropout: I totally bombed that test.
Friend: Well did you study for it.
Future Dropout: No.
Friend: Now you know.

Now you know by mintjellyfish November 12, 2011

What You Know 

One of the rapper T.I.'s best created song; very popular around 2006-2007. It was in T.i.'s album King along with Top Back, and Live In the Sky. It was number 1 on the billboard hot 100 for a couple weeks and was a song featured in the movie ATL. It is a diss song to anotehr rapper Lil flip. Its about how lil flip doesn't know anything about the game and how T.I. does. There are two remixes to it.

ay, dont yo know i got a key by the three when i chirp shawty chirp back louis knapsack where I'm holdin all the work at, what you know about that-t.i.

What You Know by bdzz January 17, 2009

Whaddaya Know Haddi-Man

I have two words for the children who are raised up on the this kids' show starring Homsar: HELD BACK. REPEATING THE THIRD GRADE. LOW STANDARDIZED TEST SCORES. I GUESS THIS IS MORE THAN TWO WORDS.

Singers: We'll have an adventure and several long trips. We'll make some new friends and maybe get a bite to eat! All 'cause we say...
Kids: Whaddaya Know Haddi-Man?
Homsar: DAAAAAAAAH! I'm a trendy tote bag!

Whaddaya Know Haddi-Man by SMD August 19, 2004

If you know what I mean 

Usually added to a sentence that makes absolutely no since but makes it sound like its a common phrase. Over all makes everyone really confused.

I too like to shake a bag of old wrenches if you know what I mean.

If you know what I mean by Don't paniccc May 21, 2016