nonsexual girl crush

A relationship between female roommates/soulmates with no romantic attraction; involving 3am giggling fits, prompted by absolutely nothing, and inside jokes so obscure that even the girls involved have forgotten their origins.

Jen and Abby have a really extreme nonsexual girl crush. I hear them giggling all night long, but when I ask what's so funny, all they can say is "It's a doodle with a gizbot!!" The hell?