crinkly doo is a term related to boinky spunge and skrunkly scrimblo. Like the terms mentioned before, it is a term of affection/endearment, or just simply something that you absolutely hecking love, that just looks so funky and funny n you just absolutely adore. It is usually used as a noun.
X: Omfg I love Okuyasu so much he's my crinkly doo.
Z: Bro... Will you be my crinkly doo?
Y: Bro...
A: B is just such a silly little crinkly doo, y'know?