Rainblow

verb
Sex act;
when one preforms fellatio on a male with skittles in their mouth. When the male ejaculates, the cum and skittle spit mix together, creating tasty rainbow slime. The two engaging in the act begin kissing and swapping spit. It is similar to snowblowing.

Dude, I just got the craziest rainblow last night.

I think you've earned yourself a rainblow.

Honey, I have had the gosh darn'st dirtiest day in the ditch, could you do your mister a favour and rainblow me tonight?