The result of late night boredom where one or more individuals try to fill a can, bottle or container of some sort with spit before a set ammount of time.
We were spit jugging with Dr. Pepper cans. The time limet was 30mins.
Last night we was so bored we started spit jugging.
Krystal:Wanna try spit jugging?
Krystal:But I love spit jugging!
Me: Yo nasty!