Foster Flop 

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 heavily".

Last night after the party I wanted to root her but I Foster flopped.

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 Flop."

Foster Flop by MoMaB July 22, 2012

fosters flop 

Australian slang for being too inebriated (drunk,tanked,etc...) to get an erection.

"Jeeze Mate, I could a shagged that sheila last night but got the Fosters Flop at the last minute"

"Fair dinkum, that's a worry!"

fosters flop by Maur Schtupedschit July 1, 2005

Foster's floppy 

Inability to achieve or maintain an erection due to excessive alcohol consumption; whiskey dick. (in reference to Foster's Lager.)

The bunch of us got fucking ripped at a bar last night, and after we went home, I tried to throw it into Nancy, but I couldn't. Foster's floppy.

Foster's floppy by Jim-Bob McDuggan August 8, 2009