your bro plays wingman
for you without you knowing. He then, after the fact, tells you about
how he hooked you up. Your bro is now entitled to one cock-block anytime and anyplace.
Your bro has a facebook conversation with
the chick he's trying
to get with
as well as her sister whom
you had a great time with
over the weekend. When you come
up in the conversation
, he defends you and puts in a good word. The next
day in the gym he shows you the conversation
and says you owe him for playing wingman. This is legit; he is now entitled to one cock-block which is considered Bro tax.