I Heard You Using the Microwave 

This means that somebody was too loud during sex the night before.

'Microwave' refers to the coitus that was had.

Justine: Good morning, guys! How did you sleep?
Carla: Not very well.
Justine: why?
Carla: I heard you using the microwave last night..
Justine: Oh dear..

'You're just jealous because you heard HER using the microwave but you can't handle that heat!'

I Heard You Using the Microwave by #THE_QUEEN November 17, 2016

why am i using urban dictionary? 

Either you don't own an actual dictionary or your looking for funny definitions like this

why am i using urban dictionary? Oh yeah, I'm not allowed in the bookstore after I hit that guy so I don't have any books

why am i using urban dictionary? by UltraBoss December 2, 2016

Usif

Usif is the most incredible guy one can be around, and he is very easy to love. He is overally kind, super sweet, and is not afraid to express his affection to those he loves. Usif is also a genius, especially in the sciences, but he is not cocky about it. Instead, he expresses humility and helps his friends be the best version of themselves. He is also the biggest hypeman, and gives such sweet compliments. He is also really funny, sees the beauty in everything around him, and appreciates the good in everyone even in bad situations. In the arts, Usif has great movie taste and he is a good rapper (and singer at times). He also gives the best hugs, and he is really cute. His only flaw is that he's not a good cook, but he's getting there. :) Everyone is lucky to meet Usif, and he deserves everything awesome in the world.

OMG! You're friends with Usif? Aren't you lucky!

*in the year 2047* Did you hear that Usif won the Nobel in Biochemistry? I'm so proud of him!

Usif by Subwaysurferamongthedunes December 23, 2021

Hey there! i am using whatsapp 

The status message of someone who isn't using whatsapp

Hey there! i am using whatsapp
No you're not otherwise, you would have changed the default status message

Hey there! i am using whatsapp by josjos21 December 26, 2021

using 

To do any form of narcotic, as in marijuana, crack, PCP, LSD, etc. The heat use this term when questioning a suspected drug user.

Cop: Hey kid are you using?
Kid: No officer, never.

using by jared r July 14, 2004

usiere 

A name of a man who is morally upright with a mysterious attractive look

He shall be named Usiere Jr.

I want usiere

usiere by _lee January 1, 2019

Usir 

Defined as a kind gesture in a fps game where you and enemy kill each other at the same time.

I killed you and you killed me... Usir

Usir by Asidrane January 10, 2022