V8 moment 

A situation or occurrence that immediately regretted.

He spoke so highly of his sexual skill. After he orgasmed in 2 mins, she realized she had a V8 moment.

V8 moment by Otis Good August 10, 2017

V8 Moment 

When you miss the point, or simply forget.

Tim: 'Joe, there's an open lane here. We can check out here.
Joe: 'Dude, we're staying in lane 6.'
Tim: 'Hello! Lane seven is open.'
Joe: 'Alright, we'll go. But there's the hot girl who likes you...too late.'
Tim: 'Oops, I had a V8 Moment.'

V8 Moment by Freakie Tim October 4, 2009