When a group of males, four or more, assemble on a field, indoor or out. One man(Commander) lays on his side and waits for another man(Baron or General) to suck his cock. He comes to the field willing to suck a cock in hopes that another man(U.S. President) will come and suck his cock. The Commander is indebted to the U.S. President and is bound to bring another man(Breaker) the President chooses to suck his cock. The process continues until the final man(Breaker) does not recieve his reciprocal cock suck.
Jeremy Beck: "Hey next week me and a group of guys are gonna get together n suck each others cocks, if u wanna join let me know?"
Izak Brown: "oh hell yeah, can I get on that Cock-Sucking Train Business (CSTB)?"
when the male uses his cock as a secondary brain, often resulting in unfortunate choices and loss of girlfriend and or bodily harm caused by aforementioned girlfriend.
man i was so cockbrain last night, i had a great time but my girlfriend kicked me in the sack this morning
To engage in the act of being a train while acting like a cock. If a cocktrain derails, it is to puke violently due to excessive drinking. Usually of caesar.