You suck dude! I have to tell you everything!

Are we gonna get some wine, dude?

Dude, she's hot!

Dude, seriously.

'Sup, dude?

Dude, trust me.

Layla was acting and talking like a dude.

Layla was talking like a dude.

That's just my way of saying things, dude. It always puzzles me that non-native speakers think they can decide if shit sounds natural or weird unless, of course, it has evident grammatical errors or the wording is fucked up.

Yanni is a pretty big dude and he trains every day.