Sargassum
A sarcastic orgasm, also known as "faking it." Can be spelled sargasm.
Girl: No matter how hard he tries, my boyfriend never gives me a real orgasm, just a sargassum.
sargassum
"This is how the world ends, not with a bang, but a whimper." -- T.S. Eliot
Upon the twilight of civilization, the sargassum sweeps upon the Florida beach and chokes all pleasure.