Not sure if you wanted me to define these terms, but...
vivacious - full of life and good spirits
mediocre - of medium or low quality (ordinary)
lame - not very convincing (weak)
Answer by JKismyhusbandbae:
Vivacious: Lively and animated; full of life and energy.
Mediocre: Having no peculiar or outstanding features; not extraordinary, special, exceptional, or great; of medium quality.
Lame: Unable to walk properly because of a problem with one's feet or legs.
