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.
A meaningful phrase used in wholesomeTikTok 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