Something you say when an already-immersive video game (such as Fallout 4 or Skyrim) becomes even more immersive as a result of a user-created modification. In order for a user-created modification to be considered immersive as fuck, they have to be lore friendly, somewhat realistic, and/or balanced (AKA not op).
Viewer: But is it immersive as fuck?
MXR: Well, the weapon is only obtainable after you complete a ridiculously hard quest. Not only that, but the ammunition for this weapon costs a fortune. This means that this mod is indeed immersive as fuck!
Wrong As fuck, commonly shortened to "wrong af". Derived from the famous University of Central Florida football player Micah Anderson. It is known that a person is "Wrong as fuck" if a person says something that makes entirely no sense at all, or states something of the utmost of obviousness.
Bro-bean: Dude have you seen my ray-bans??
Snacks: What ray-bans???
Bro-bean: the ones in your twitcons dude , I let you see them..
Snacks: naw man I haven't seen them
Bro-bean: Man you wrong as fuck.