“as fuck” a term that originated in African American Vernacular English, more commonly known as the acronym AAVE, is used to emphasize an adjective in the sentence. Therefore you cannot say “me as fuck” because the sentence, or lack thereof, grammatically does not make sense.
“i look dumb as fuck right now”
as in: “i look really dumb right now”
this suggests that there is an abundant and plentiful amount of dumb being exuded
“i have a headache as fuck”
same as: “i have such a bad headache”
this could indicate that said headache is causing abundant and/or constant pain
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!