spock cock

When you can't get it up because you're thinking about it too logically

Sorry luv, but all this talk of weddings and kids has given me a bit of the old spock cock, mind if we don't do it tonight...

Spock cock

When a woman positions her hand around her vagina with two finger each side, pulls firmly up and holds then attempts to urinate with full force. This will produce a stream of urine as if it were a penis producing it.

Woman 1: "There's only urinals free in this gender neutral bathroom"
Woman 2: "No worries, I'll just whip out the Spock cock and show those lads what's what!"