who is perfect

the person reading this is perfect, remember your loved

someone who is perfect is the person reading this right now

Who asked.

"Who asked" is a Last resort comeback for when a person doesn't have any more arguments.

"Insert super good argument"
"Who asked?"
"I didn't ask."

"You're gay."
"Who asked."

Who left

Your dad

‘Dad, who left to go to the shop for milk and never came back’

who got?

Highly bastardized, this phrase originally was a shortened form of "Who Got That?" That usually meaning weed or some other friendly substance.
Somebody or Somebodys, after calling people and asking 'Who Got?' so many damn times simply began employing the phrase to mean almost anything, including 'What's up?' , 'Excuse me?' , 'Hell yeah!' etc...
Sometimes it is still used to find out who got.

Guy looking for that: "Yo man, all I wanna know is... Who got?"

Guy to other guy, upon meeting: "Who got!?!"

Guy 1: "I'm hungry, let's go to pizza hut, pizza hut's the shit!"
Guy 2: "Who got!"

Who cares

A remark adressing female attire that, despite breaking dress codes or rules of decency, is commonly accepted due to the atractive nature of the wearer.

"what's with all the chicks wearing booty shorts and tight-ass tank tops?."

"who cares?"

Who’s Joe?

Joe mama

Friend: You know Joe?
Me: Who’s Joe?
Friend: JOE MAMA 😂😂😂😂

who me?

A phrase used by ignorant people either to deflect a question that they were not prepared to answer, or because they are in an uncomfortable situation that is beyond their grasp.

-Sitting in an interview-

"So, what kind of work have you done?"

"Who me?"