Emily Lan's definitions

you know that

1) expressing approval/enthusiasm
2) expressing that something is a well known fact or that someone has just stated the obvious

"I'm gonna gets me some vodka and smuggle it in"
" you know that shit!!"

"This office party is gonna be so lame"
"you know that" i.e of course

" I wish Rocky B hadnt changed his name to MC Platnum"
"You know that" i.e true that mother fucker its a fucking travesty

by Emily Lan November 9, 2006

ain't that the mother fucking truth

1) Expresses utmost concurrence/approval with what your bredrins are saying;
2) Damn straight;
3) You know that/ you know that mother fucking shit;
4) thems the breaks i.e that is just the way it is/ consignment to a sad state of affairs.
Also can be used long form "and aint the the mother fucking truth" or abbreviated to form "ATTMFT"

Dude 1:
"I feel to get drunk tonight"
Dude 2:
"Ain't that the mother fucking truth"
Dude 1:
"ATTMFT, watch"

by Emily Lan November 10, 2008