Sidemoon 

The showing of the female butt only from a side angle, quite often in a sexual way.

Dude, Brooke just gave me a sidemoon last night, and it was hot!

Sidemoon by EchoPizza February 19, 2019

sidemon 

A sidemon is one who is off to the side. The characteristics usually include stupidity, submissiveness, shiestiness, and sexual ambiguity.

Dave stole my stapler!
What a sidemon.

sidemon by Israel Johnson August 7, 2007

Sidemount 

To sidemount is to climb onto (a female) for copulation, but in this case the male is partially or completely side-wise.

Her kid was sleeping on the other side her so I had to sidemount her.

Sidemount by Hartter123 September 10, 2014

sidepoon

when, in a photo, the lady's poon is slightly visible on the side angle, however, not exposing enough to be explicit.

danielle lloyd on sideboob.org has some sidepoon going on as well. http://www.sideboob.org/index.php/c15/c164/

sidepoon by sweetsidepoon January 7, 2009