blow job given by a chick that has lipstick on, leaving a ring of color around a dudes dick
when kim got all whored up that night she gave paul the prettiest rainbow dick he ever had.
taste the rainbow baby!
by gigi July 26, 2004
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When a long penis is curved in a boomerrang shaped fashion.
"Wow, you have the nicest rainbow dick i have ever seen. Is there gold on the other side?
by Kelley September 10, 2003
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person 1:wow did you see that giant unicorn rainbow dick.

person 2: yeah it was fucking huge
by DLAB09 August 13, 2011
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