Explanations

Note on pronunciation: notice that when she pronounces the sound /sh/ after an /n/ it sounds very similar to "ch". This is not something normal, but some people in America do it. For instance, pay attention to how she pronounces "attention" (that sounds like "atenshon", but she makes it more similar to "atenchon") or "don't be mad once you see": "once you" has an assimilation and may sound "wunshoo", but she makes it similar to "wunchoo".

ALL THE SINGLE LADIES= This song is addressed to all the single ladies, so she begins by asking them to listen.

PUT YOUR HANDS UP= In this context it means to show that you're there, ready to fight for your rights.

UP IN THE CLUB= Over there, in the bar.

WE JUST BROKE UP= We have stopped our relationship a moment ago.

I’M DOING MY OWN LITTLE THING= I’m minding my business, I’m living my life.

DIP= To run fast away from something, to leave abruptly. You decided to dip = you had suddenly stopped our relationship.

YOU WANNA TRIP= You want to overreact, to go crazy.

CUZ= Because.

BROTHA= Brother. Among black people, a brother/sister is another black person.

NOTICED ME= Saw me.

I’M UP ON HIM, HE (is) UP ON ME= They are dancing closely with each other, both of them touching the other person. (They are practically on top of each other)

"DON’T PAY HIM ANY ATTENTION"= This is what she told her new friend when her exboyfriend began to shout at her.

I CRIED MY TEARS= I cried, wept.

MAD (AmE)= Angry. (BrE mad = AmE crazy)

HE WANT IT= It should be "he wants it", but in very colloquial English they often drop the S for the 3rd person singular. And something that happens very often in America is that N+T=N, so "want it" sounds here like "wannit".

SHOULDA= Should have (this is a very common way to pronounce it in conversational English, even in BrE).

YOU SHOULDA PUT A RING ON IT= You should have put a ring on my finger. If you put a ring on your girlfriend’s finger you’re asking her to marry you and you (boyfriend and girlfriend) become fiancé (male) and fiancée (female) until the day you get married; that day you are bride (female) and bridegroom (male), and later you are husband and wife.

GLOSS= A transparent but shiny liquid you put on your lips (or on your nails) to make them shine.

HIPS= The part of your body right below your waist.

DEREON JEANS= A fashionable make of jeans.

ACTIN’ UP= Behaving improperly.

I CAN’T CARE LESS... = I don’t care at all.

YOU HAD YOUR TURN= You had your opportunity.

YOU GON’ LEARN= You are going to learn.

DON'T TREAT ME TO THESE THINGS OF THE WORLD= I don't want presents and luxury (what I want is your true love)

DESERVE= If you deserve something, you should have it because you are good enough for it.

DELIVERS ME to= Sends me to, takes me to.

AND BEYOND= And farther away.

PULL ME INTO YOUR ARMS= Hold me, hug me, embrace me.

GHOST= The spirit of a dead person.