The catchphrase of Revolver Ocelot from the Metal Gear Solid series. A sign of high respect and admiration. Given to him by Big Boss in MGS3, then given from Ocelot to Solid Snake many years later.
Big Boss: That was some fancy shooting. You're pretty good.
A sudden outpouring of fangirl attention and love for a fictional character who has recently been portrayed by a conventionally pretty actor in the live-action adaptation. This often angers the purists and hipsters who liked the character before he became hot and popular. Usually applicable only to male characters.
Fanboy 1: Girls are going nuts for Loki ever since The Avengers came out.
Fanboy 2: It's Pretty Actor Syndrome, they're just here for Tom Hiddleston
An exclamation that was originally used by idubbbztv on a video on TVFilthyFrank's channel. The phrase has spread rapidly through the internet, and idubbbz himself gets annoyed when other people say it.
Papa Franku: What do you boys think?
idubbbz: Hey, that's pretty good!
Others: *laughing*