Guessume (or guessumption) is a combination of guessing and assuming.
I guessume you bought us dinner?
When you or someone else takes a photo of another person without their consent.
I'm going to photo rape that hot guy.
That girl took a picture of me without me knowing. That's photo rape.
A person that steals your girl.
I was flirting with that chick and then a Booty-Burglar came in and stole her.
An insult, mainly directed toward women. Faggot, but for girls.
She totally lied straight to my face. She's such a feego.