FTE means For The Eternity. Was created by a facebook group but soon grew to encompass many parts of the web.
The actual meaning, "For The Eternity," is largely unknown. Most people think it means "Full Trucker Effect", "For The Ewoks", "Fail To Eject", and even "Full Time Equivalent." These are wrong.
FTE can be used in any situation FTW would be used.
FTE is often written with 1 - 3 exclamation points after it.
This example contains no sexual innuendos! FTE!!!
I will survive the heat death of the universe! FTE!!! Literally!