asslusion

An illusion of ass. When a girl's clothing makes it appear like she has a nice ass, but in reality there is nothing there.

also applicable to men

"Damn that girl got a fine booty!"
"Nah man, she flat. Them jeans just be givin her an asslusion."

by LewDaMan October 9, 2016

Optical Asslusion

When ones gluteus maximus appears to be rotund but when a closer look is taken, it is actually taking the affect of an ass but no ass is found until further investigation is taken and the ass begins much lower.

The "Optical Asslusion" Looks good from far, far from good.

by WAAAAAAAAAAAALT April 21, 2008