Definitions by Prince J Albert

Eruction 

Instant ejaculation following the emergence of a boner. One gets an erection and ejaculates seemingly simultaneously.

Dude, I just had an eruction.

Eruction by Prince J Albert March 4, 2008

Ereption 

An ejaculation occurring while the penis is not erect. This often catches the male off guard and makes a horrible mess

Shit, I didn't see this ereption coming.

Ereption by Prince J Albert March 4, 2008