1) A hairstyle very similar to a mullet, but slightly more wavy.
2) A move in bed where you finish doing a girl from behind, flick your head back and wave your hair as if you were on a shampoo commercial, and then yell in a low voice "OH YEAH, IT'S THE FREUND!"
Girl: "Nice 'do, loser. Way to sport the freund."
You: "Haha. You know you love it, baby. Now I'll show you why they call it 'A girl's best freund.'"
After Adam finished nailing Emily from the back, he pulled the freund on her like it was his job. Mike Piazza rolled over in his grave.