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1.
The incident invoked by putting your latte down on the counter to reach for condiments. In doing so, gravity combined with the sheer amount of milk foam reacts in such a way as to send a plume of foam out the small hole in the top.
Starbucks patron #1: "Ew, what the hell is that on your shirt?"
Starbucks patron #2: "Fuck, I know! My machiatto totally ejaculatte'd all over me!"
by tanzfieber October 20, 2007
 
2.
When you ejaculate into someone's coffee
I gave my girlfriend a ejacula'tte
by thepenguin3773 December 10, 2011