A sexual move in which the member with a penis inserts said penis into the mouth of someone who has several boba pearls in their mouth. The name comes from the likening of the pearls inside the sucker's mouth to the eggs inside a pregnant spider's egg sac.
Dude, Tony totally gave me a pregnant spider last night. We went and got tea beforehand, which is some weird foreplay shit, but I was kinda into it.
by oworm? December 17, 2017
Get the pregnant spidermug.