a gumpin is not a static measurement because a gumpin is defined as "the distance from the top of the cliff to the water" thus a gumpin is never the same.
T: I dare you to gainer the gumpin!
S: I dont know how to GAY-NOR
T: It's "gainer" not gaynor, you fucker.
I answered my physics test in gumpin lengths.
Dude that cliff is like 3/4ths of a gumpin.
Gumpin is pronounced "Guu-om-pin"
the amount of water in dolime quarry is 36 gumpins cubed (i.e. 36g^3 opposed to 300m^3)