Foster Flop is an Australian saying, humorously describing the inability
to get an erection after drinking too much beer.
It is comprised of "Foster", as in the famous Australian beer brand Foster's, and "Flop", as in "to fail
completely" or "to fall
Last night after the party
I wanted to root
her but I Foster
Too bad you had a Foster
Flop, otherwise we could have had sex.
"Did you have sex last night?" "No, I couldn't. I had a Foster