look up any word, like sex:
 
1.
a. someone who pisses you off so badly there is no result but to call them a semenface. A worthless person.

b. after ejaculating onto someone's face it is appropriate to call them a semenface.
a. God you are so damn annoying, shut the hell up semenface.
b. Awww that felt good, ha, look at you, you semenface.
by juggle_boy January 17, 2007
 
2.
(noun): Often refering to a sluty female. This is because a slut will commonly get a face-full of semen when she is giving a male a blow job.

synonym: slut
Hannah is such a semen face.
by rebecca</3 April 29, 2007
 
3.
(noun): Often refering to a sluty female. This is because a slut will commonly get a face-full of semen when she is giving a male a blow job.

synonym: slut
Hannah is such a semen face.
by rebecca</3 April 21, 2007