I'm in. 

A word used by side-acting hackers in movies when they have access to the mainframe.

Nothing can stop them now.

*vigorously types into the CMD prompt with green text color then presses enter*

I'm in.

I'm in the mainframe.

I'm in. by bighandednigga June 3, 2017

i'm in 

"I'm in" is an alternate form of "count me in" which means "include me"

- I'm feeling hungry, so I'm going to order pizza. Who's in?

- I'm in

i'm in by Siemprejorge August 8, 2014

I'm in 

I will participate.

Keisha: "We're doing some trail improvement work on the south slope this Saturday at 8:30 AM—will you help?"
Samara: "I'm in."

I'm in by leannain-facal June 7, 2019

I'm in 

What a man says after placing his Tiny Rick into his lady's gapping chasm.

Her: Oh baby, give it to me!
Him: I'm in.
Her: oh...😢

I'm in by Smackum Yackum September 13, 2022

I'm in! 

Slang used by classless, low brow, ghetto male douchebags (usually brown people, but they don't have the monopoly on it) when a pretty woman (or let's face it, for these types of males, anything with two legs and a vagina) walks by to denote they would like to *checks notes* "tahp daht ayss"-have sexual intercourse with her, for those of you who don't speak Ebonics. Consent optional, of course.

Woman walks by
Brown person: I'm in!
-----
Woman makes Youtube video
Ghetto Trash commenter: I'm in!

I'm in! by timberwolf0095 March 7, 2025

I’m in love with my car 

Written by Roger Taylor from the band Queen. He loves his car. Period.

He locked himself in a cupboard.

Friend: “Why would anyone write a song called ‘I’m in love with my car’?”
Me: “Because he has a feel for his automobile.”

I’m in love with my car by wattwatt88 February 14, 2019

I'm in the trenches, relax 

Lil Durk's verse in Drake's hit single "Laugh Now Cry Later". A popular phrase used by some. It means, despite gaining a lot of fame and wealth, Durk is still in the hood. Lil Durk has not forgotten where he came from.

Malachi: The boy, Jacob, catted. The boy think he all that, now he don't wanna be associated with us.
Jacob: I'm in the trenches, relax.

I'm in the trenches, relax by Jorolb December 5, 2020