galagoogoo - This word is when a man is so confident, he thinks he’s the

This word is when a man is so confident, he thinks he’s the only one who matters in the whole world.

'He said, 'I don’t need anyone, I’m the best at everything.'

'He walked in and said, 'I’m the only one who matters in this whole world.'

'He texted me, 'I’m gonna win, and I’m gonna do it without even trying.'