This is an outdated term for oral sex. It does not imply any particular gender or power orientation. This is very common in Victorian era erotic writing.
trans. To practise fellatio or cunnilingus (with); also intr. Also as n. Hence gamahucher.
The Count and I often sandwiched them between us, which they declared
to be the _ne plus ultra_ of pleasure, while the upper operator
gamahuched the unoccupied quim.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."