A portmanteau is where
two or more words are combined to make a
new word (e.g.
bootylicious, turducken).
A portmantbro is a portmanteau where one of combined words is "bro" (e.g. brogrammer, broga, humphrey brogart, broadkill, etc).
Me: I tried going to broga for the first
time yesterday, turns out it was a bunch of brogrammers. I was totally broadkill.
Grandma: Can you go a
single sentence without using a portmantbro?
Me: Chillax Humphrey Brogart.