Grumbler, this just means сперма. That use of the word in reference to a liquid is from one idiot on a tv show called Good Eats. No one would dare use this word that casually under normal circumstances.

OK, I'll delete it
It's worth saying that "малафья" is hardly ever used now, replaced by western "сперма"

"spooge" is also hardly ever used and highly colloquial.