what'm 

a combonation of the the words "what" and the contraction "i'm"

What'm trying to say is......

what'm by Anyanka June 29, 2010

This guy knows what I'm talking about 

An expression used to diffuse responsibility for an unpopular statement made in a public setting. Typically used to imply complicity or collusion on the part of an unwilling stranger.

You: I mean, really, who hasn't made out with a rundown fat chick in a moment of drunken desperation.

Crowd: *silence*

You: *smile and point to a random guy in the crowd* This guy knows what I'm talking about.

This guy knows what I'm talking about by Ggggggaaaaaaaaaaaaaaaa March 22, 2009

Trust Me, I know what I'm doing 

A phrase often usd by people who don't really know what they're doing.

This catch phrase was often used by the 80's TV cop Sledge Hammer right before he does something that results in some sort of catastrophic event or disaster.

Captain Trunk: Sledge, you cannot disarm that nuclear bomb!

Sledge Hammer: Trust me, I know what I'm doing.

(A nuclear explosion ensues thus ending the season finale of Sledge Hammer)

Trust Me, I know what I'm doing by d_art July 10, 2005

Chase a bag, Don’t worry ‘bout what I’m doin’ 

From the song Dead locs by Blueface. To tell someone to mind their business and focus on other things than what you’re doing

Melanie: “ where are you going!?!”
Daniel : “ Chase a bag, don’t worry ‘bout what I’m doin’ “

Chase a bag, Don’t worry ‘bout what I’m doin’ by Lollii.x January 4, 2019

I don’t know what I’m doing lol

What you can say when you literally dead because of how bored you actually are.

Dude 1: i don’t know what I’m doing lol
Dude 2: cmon let’s go play sum minecraft

I don’t know what I’m doing lol by Ummmmm hi May 14, 2020

that's what i'm talking about 

Something you say when you see something really cool, or a hot girl walks by. You can say it even if you never talked about the subject before.

Two dudes sitting around.
15 minutes of silence
Dude #1: "Look at that chick!"
Dude #2: "That's what I'm talkin about!"

that's what i'm talking about by whodey June 15, 2004

scooping what I'm pooping

When someone understands what you are trying to tell them.

Do you understand what i'm saying? Are you scooping what I'm pooping?

Man, he just doesn't get it. He's not scooping what I'm pooping.

scooping what I'm pooping by kusodekai_bcs April 20, 2010