Basically a fangasm, but more of a jizz version.
And if you don't know what a fangasm is, it's like a screaming/yelling/OMG'ing reaction to something that fangirls/guys like.
Fanjizzmypants, Fanjizzmyshorts... you name it.
Fanjizzm is the (non)official plural.
Person 1: OMG I JUST FANJIZZEDMYPANTS. <3 <3
Person 2: Haha, I dunno about art, but I know about FANJIZZMY (_______)!
Person 3: LOL FANJIZZMY.
That word should go onto Urban Dictionary.com