Another quote from Blade Trinity by Hannibal (Ryan Reynolds)

A situation that has become compromised in an extreme and unusual way.
Fucked to a greater extent than completely fucked or totally fucked. Based on the misconception that Chinese women have sideways vaginas.

An ejaculation that, when uttered sarcastically, say by someone like Aubrey Plaza, may be a response to not being surprised at news that is supposed to be surprising or enlightening, as being fucked sideways allows the vagina to be both more deeply penetrating and stimulated in a greater variety of places than most other types of fucking. It may also refer to the desire to exit oneself from an undesirable situation to a much better one.

when you either get a fright or you could just find something mind blowing.
p griff ;)

when the man is on his side, and the woman is laying next to him on her back with the penis inside the vagina and their legs intertwined.

a term used when somebody fucks up royaly and can’t think of anything to say so they just say “fuck me sideways”

referring to someone who is really screwed. just a bigger emphasis on how fucked they are.

this is far from a good thing, if you couldn't tell by the name.