The French Astronaut is when a man sticks his balls between a woman's butt cheeks while another sucks his dick.
"Man I totally gave those two chicks a ride on the French Astronaut last night!
by Hoohoodilli January 19, 2011
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Codeword for a fussy eater.

Named for Frenchman Thomas Pesquet, whose meals in the International Space Station will include lobster, beef bourguignon, cod with black rice and almond tarts with caramelized pears.
"We've got a French Astronaut at Table Seven. Prepare to have everything sent back."
by Monkey's Dad April 25, 2021
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