Anyway, whatever anyone may mean by Stuckism, the Oxford English Dictionary defines the word 'stuck' as the past participle of 'stick'.

i) insert, thrust or push (an object or its point) into or through something, be or remain fixed with its point embedded - stab or pierce with a sharp object (ouch, mama, let me live!).
ii) put somewhere in a quick and careless way. Informal use to express an angry dismissal of a particular thing.
iii) protrude or extend in a certain direction.
iv) adhere or cause to adhere.
v) (be stuck) be fixed in a particular position or be unable to move or be moved - be unable to progress with a task or find the answer or solution.

All artists without exception spend much of their existence in this final definition- without the 'stuck', the moments of inspiration would not exist, it would be like trying to define sound without silence, music without pauses.

Stuckism has liberated art by its integrity as a leading voice for the preservation and promotion of representational and figurative painting as a leading art medium. Its ethos is inclusive and adaptable. It recognises originality, creativity and craftsmanship, and delights in work that projects feeling and emotion through genuine composition.

In Stuckism the human hand is evident. The Stuckism tradition is that of early civilizations, as recognised by Cezanne in his formative influences and by Gauguin in his sculptural adoption of Polynesian totems. These are abundantly evident in his work, which also conveyed emotion through bright expanses of flattened colour. Picasso also was attracted by the aesthetic simplicity of early ethnic artifacts. These often related to potency and fertility. Matisse as the master of decorative painting rarely compromised simple line and broad brush.