A splinter is a fragment of a word, broken along boundaries that do not coincide with morpheme edges, that begins to combine more-or-less freely with other roots. In time it may develop into a true affix or bound root, independent of its source. Some found examples below:
I’ll argue that -ocalypse has recently taken on a life of its own and become common enough for bakingocalypse, like snowpocalypse and its other relatives, to no longer be considered simple portmanteaux.
dorktastic, funtastic, craptastic, asstastic, et al.
Bonus for Neil-tastic and (non-splinter) Neilism.
-tastic, but cuter:
Ever since the movie Inception, anything recursive is now X-ception. See also train-ception, frog-ception, Russian-stacking-doll-ception, etc. (Thanks, Urban Dictionary. I swear I’ve heard better examples in the wild, but I’ve lost track by now.)