If I understand the question correctly the word you are looking for is smiles. It's the longest word because there is a mile in the middle.
It is nonsense. It is just used to represent the longest word in english
Do you mean 45-letter word?Pneumonoultramicroscopicsilicovolcanoconiosis
TAC
riddle
If you mean Tom Riddle, he was Voldemort in the Harry Potter series of books and movies.
incompleted pass
Midlife crisis
All mixed up.
butt
Banana Split
Do you mean the longest? Canada has the longest coastline.
I'll Die For Jesus?