1. of, resembling, or of the consistency of gum; viscid; mucilaginous.

2. covered with or clogged by gum or sticky matter.

3. exuding gum.

gummy bears are usually chewy, so Im guessing thats where viscid and mucilaginous come into play…as far as Gumby the cartoon character goes, Im not sure, but he did look like clay or something sticky, and that could easily fit the definition, but the definition according to dictionary.com is as follows:

gumby

/guhm’bee/ n. [from a class of Monty Python characters, poss. with some influence from the 1960s claymation character] 1. An act of minor but conspicuous stupidity, often in `gumby maneuver’ or `pull a gumby’. 2. [NRL] n. A bureaucrat, or other technical incompetent who impedes the progress of real work. 3. adj. Relating to things typically associated with people in sense 2. (e.g. “Ran would be writing code, but Richard gave him gumby work that’s due on Friday”, or, “Dammit! Travel screwed up my plane tickets. I have to go out on gumby patrol.”)