You may remember Mexico's former President Vicente Fox from this clip that surfaced last year;
Well, since then, wallflower Fox has been unrelenting in his criticism of Trump and his wall.
He has called him loco, which means crazy as you probably know.
According to BuzzFeed he called him 'pendejo' which loosely translates to 'berk' or even 'fuck face'.
And he has stayed adamant that he, and the Mexican people, will not contribute to the wall at all.
He also introduced his slang 'fucken wall' which went down well on twitter.
People were pretty into the phrase #fuckenwall.
But after this tweet,
#FuckingWall really kicked off.
In this new Twitter age, its pretty hilarious and disturbing to watch current and former world leaders troll each other.
In this case, however, we reckon it's all for a good cause.