Good For You (sarcastically)
Go Fuck Yourself
guy 1: "I pwned ur bitchass u n00b"
guy 2: "GFY, now GFY!"
Someone who masterbates frequently. Heavy play on the word masterbate = master bait or master baitor (one who baits hooks, thus giving the person title of supreme fisherman).
I swear John never comes out of his room when mom and dad are gone, he's a f*cking supreme fisherman I tell you what"