A quicker way to say "fucking."
Omfg, my boyfriend is fxn pissing me the fuck off!!DX
Shorthand for the word "function". Typically used in a mathematical, computer programming, or engineering sense, it can also be used in other contexts.
Mathematics: "Note: relearn trig fxns..."
Computer Programming: "Instead of creating a global variable, create a private variable with accessor/modifier fxns."