Of or pertaining or proper to the jib or boom of a crane or derrick or its inclination with regard to the post.
The Century Dictionary (Public Domain)
Use "derricking" in a sentence
"But with these lively quarter-pounders of the Taylor Brook, derricking is a safer procedure."
"What I minded was the thought of an hour's vain wading in that roaring stream, whipping it with fly after fly, while R., the foreordained fisherman, was sitting comfortably in a sawmill, and derricking that pair of three-quarter-pounders in through the window!"