It appears that only predicative adjectives in Jamaican may be modified with a degree word. I have not yet come across an example of an adjective in attributive use co-occurring with a degree word.
There are some degree words, e.g. tuu (< Eng. too) which are only used in front of the predicate adjective, and others, e.g. bad (< Eng. bad) which only occur after the predicate adjective.