Note on pronunciation: notice that when she pronounces the sound /ʃ/ (sh) after an /n/ it sounds very similar to /tʃ/ (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 /ətenʃən/, but she makes it more similar to /ətentʃən/) or "don't be mad once you see": "once you" has an assimilation and may sound /wʌnʃu:/, but she makes it similar to /wʌntʃu:/.

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. This spelling simply reflects the common black AmE feature of not pronouncing the R unless it is followed by a vowel (same as in BrE)

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)

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.

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".

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 brand 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.