Lube tube is the female version of a douchebag. Usually identifiable by the wearing of uggs and a northface. If wearing sweatpants too, then definitely a lube tube.
While walking around the mall I saw a whole pack of Lube Tube's.
Two people covered in lubricant holding eachother forming a ring shape. A third person also lubed up penetrates both individuals using his hands or feet.
Jill: Iām so bored
Samuel: I think we should do a lube tube with eachother to not be bored