When a man ejaculates his semen from a distance into another individual's mouth. The individual receiving the semen is sometimes referred to as "the pot of gold" at the end of the Cum rainbow.
Justin positioned himself 2 meters away from Ryan, and with great precision, managed to ejaculate into Ryan's mouth. Justin had achieved a Cum Rainbow.
by Dezmuz June 01, 2016
"The boner i have is so vicious, i could cum rainbows"
"That chick was so hot, i swear i almost came rainbows"
"That chick was so hot, i swear i almost came rainbows"
by ToastyXP October 20, 2008
by chocolatethunder19 August 14, 2017
by velma green the spider queen June 08, 2012
A common phrase on sites such as Derpibooru, e621, Rainbooru and Rule 34 that means wanting to impregnate the character Rainbow Dash from the series My Little Pony Friendship Is Magic.
by SonicTheDankHog December 28, 2022