a sesquipediophile
I'm not sure what I'd call that person...but I would suggest you check a dictionary. "Lenghtly" is not a word, and you've misspelled "explanation."
You shouldn't call them anything.
This student is very fond of plagiarising answers.
it takes approximately 3mins to call one person.
Anything outside your area code is usually long distance.
procrastinator
The word 'fond' has a short O sound, as in bond and pond.
This type of person is commonly referred to as a "sesquipedalian" or someone who uses "sesquipedalianism," which means the excessive use of long words. They may also be described as pretentious or condescending in their communication.
Loquacious means chatty or knowing many words, especially unusual words. Verbose means good at speaking for long periods of time. Grammarians study a language for a living.
A pilgrim.
A fond farewell means that although you may not see that person for a very long time, you are wishing them well, or blessing their future with fortune, because of the fondness or love that you have shared with them in the past. There had a be a bond or relationship or good times shared, for a farewell to be fond. But to farewell (without the fond bit) someone has the same meaning. So "fond farewell" is a reinforced phrase, a little of a truism. The phrase is a bit of a cliche. This source might help: www.fond-farewell.com.
You could call the person a clown if it is done as something funny.