New Definitions

[Mid Life Crisis Marathon Man]

I don't know about new meanings for existing words, but I did make some up some new words for a similar local competition:

bioxymoron, n. A double-barrelled oxymoron, as in “Defence Intelligence Organisation" or "Veteran Runners Society".

hallucinopiscalism, n. An illusional state in which there is a tendency to believe one’s own fishing stories.

raptitude, n. A natural tendency or acquired capacity for knocking on doors.