I'm gonna cum! 

A warning given near the end of coitus, usually directed toward a female from a male

Guy having sex with girl: "I'm gonna cum!"
Girl: *Covers face or whatever else she doesn't want the splooge to get on*

I'm gonna cum! by Mitch Tyler September 3, 2009

i'm gonna cum! 

A common phrase used during the act of sex or masturbation, usually exclusively used by men. It signifies appraoching orgasm and/or ejaculation. The ending "cum" is a play on the word come, and in turn derived from the common term cum.

"Oh god! I'm gonna cum!"

i'm gonna cum! by thedoctor44 June 20, 2007

I'm gonna cum! 

"I'm gonna cum!" is what a lot of guys shout just before they reach the point of no return and blow their load.

Matt always shouts "I'm gonna cum!" just before he fills my mouth with my cocksucker's reward!

I'm gonna cum! by USAF Cadet December 22, 2020

I'm gonna cum

cum is the white poo soo uhhh

I'm gonna cum!

I'm gonna cum by Sophia_Cutie19 September 27, 2022

I'm gonna cum to your house and knock knock on the back door 

A dirty way of saying surprise butt-sex.

1.Waffles: Hey Dwarfo, I'm gonna cum to your house and knock knock on the back door. If you don't answer, I'm gonna bang bang!

Dwarfo: Yeep! I hope it isn't too surprise!

2. What rapists say to little kids when they are gonna butt-rape them.

I'm gonna cum to your house and knock knock on the back door by Dr. Dirty October 9, 2008

I'm Gonna Cum On You 

A meaningful phrase used in wholesome TikTok lives and congratulating your teammates/opponents in games. It doesn't have a specific meaning just used on anything happy/wholesome.

Example 1:
Other Team Wins:

You: I'm gonna cum on you

Example 2:
TikTok live with people with disabilities and terminal illness
You: I'm gonna cum on you

Example 3:
Friend: I can't believe I beat you in that race
You: I'm gonna cum on you

I'm Gonna Cum On You by Wholesome gamer May 11, 2023

"I'm gonna cum, let me cum on your chest, will you?" Bachira whispered closely to Isagi, his breath lingering on the boy. 

"I'm gonna cum, let me cum on your chest, will you?" Bachira whispered closely to Isagi, his breath lingering on the boy.

"I'm gonna cum, let me cum on your chest, will you?" Bachira whispered closely to Isagi, his breath lingering on the boy.

"I'm gonna cum, let me cum on your chest, will you?" Bachira whispered closely to Isagi, his breath lingering on the boy. by Anon42283 March 3, 2024