1.) Tall, notoriously strong, grumpy individual in a position overseeing the grunt work and maintenance work at an institution. think giant grumpy oger who can fix things by getting pissed and hitting them (like the fonz). he is the one in your office/job that has worked like 20 other jobs, and who has seen every problem before, and has an "I'm over it" attitude to any new problems because they're boring. every job has one.
2.) a vital, resentful, grumpy, dirty, element which keeps an entire operation running with pure will and grunt. remove this rusty iron pin it and it is likely the whole shiny brass machine will fly apart or explode.
"who is the Abe around here?"
person 1: "something (anything) is broken"
person 2: "call the abe"
"Who is going to become the new abe around here? "
"our shop just lost its abe"