When the time has arrived to undertake a task (often unseemly, difficult, or requiring courage), at which point there is no going back.
MacBeth screwed his courage to the sticking point and approached Duncan's sleeping form, his dagger poised for the killing blow. It was go time!
by SeaBat June 10, 2006
A phrase to say when it is time to undergo a task and get serious about doing something. Commonly used in rowing or other sporting events/practices. Go Time signals you to concentrate your energy and push to your absolute limits and be a better version of yourself.
Keygan asked, “You know what time it is right?” “It’s go time.” The boys responded.
by keygfresh June 5, 2021
Phrase most commonly used to describe that you are cocked, locked, and ready for action.
Dude: Hey, bro, what's going on?

Buddy: Dude, I just slammed my 7th shot of Jack Daniels and it is go time!
by dammit janet October 21, 2004
1) phrase meaning, "I challenge you to a streetfight," usually accompanied by the challenger assuming a fighting stance

2) phrase accepting such a challenge to a streetfight
"I'm sick of you insulting my mamma! It's go time, you punk ass bitch!"
by Da Nasty One November 19, 2004
It's time to go, guys.... break!
It's...................GO TIME!!
by bgordon August 8, 2005
Awesome powah that cannot be stopped.
I see by this fine BLGT clock (featuring me, Brad!) that it's GO-TIME!
by One Ton Angel March 26, 2003
A term used to describe a female giving oral sex.

Example 1:
Male: "You know what time it is?"
Female: "Go Time?"

Example 2:
Male: "Damn, nothing is going right."
Male 2: "Yea, you need to get you some Go Time."
by Its Suspense February 25, 2008