two tube
Two tube is southern slang for a double-barreled shotgun.
Don't mess with him, he's got a two tube loaded with double ought.
Two Tube Transfer
When having a threesome and the guy is ready to nut, he nuts half of his load in one person, clenches and deliver the second half of his nut to the other person.
Omg! Jonathan is so talented, he was fucking me and my girlfriend when he did a two tube transfer!