Put simply: cow jizz. Whether extracted naturally, artificially, or otherwise, moo goo is moo goo. Furthermore moo goo is an ancient chineese secret remedy to lonelyness and itis and makes a great addition to that ex-girlfriend's new haircut.
random guy: I almost passed out after that burger, until I had a shot of moo goo.
The acient eastern art of using stealthly martial art skills to rub one out directly next to or in close proximity to either a roomate or complete stranger.
It was dark and quiet that night in my dorm room... It was a little too quiet. I wasn't sure but I had the feeling that wang, my asian roomate and also bunkmate was quietly pulling a Moo Goo Guy Pan on me while we both lying in our bunk bed and I couldnt do anything about it.
I went to the Chinese place around the corner and walked up to the counter and caught the owner yelling “ moo goo gai pan!” Repeatedly as he was cumming on a cats face he was preparing to cook.