When a group of males get together and all proceed to masterbate and blow their loads onto a cookie. The last person to ejaculate has to eat the cookie. Can be also done in a tournement like fashion.
When we played cum cookie Jim blew last and had to eat the cookie.
by Matt Cheese August 30, 2006
1 more definition
When a group of guys get together and masturbate. They have to cum onto a cookie (hence the name 'cum cookie'). The last person to cum has to eat the cookie.
When we were playing cum cookie last night, luke lost and had to eat the cookie!
by UKCPD August 15, 2008