1. The act of jizzing. More so intended for girls to use, hence the clit.
2. Expressing your frustration in someone/something. Used the same way as fuck, goddamn, etc.
1. Claire: Oh my god, did you see that picture of Emily Browning? Major clitjizz.
Jeremy: Clitjizzin' all over the place.
Natalie: Whoa, Josh Farro's manboobs, clitjizzin' in my panties
Claire: Gtfo with your Italian sausage.
2. Chriss C just found out about our plan, clitjizz.
A word that describes an amount or quantity while giving it a little extra "umph".
Claire: My grades are so goddamnly high.
Jeremy: Uh, no one cares about your goddamnly high grades.
Natalie: Oh my god, Josh Farro's manboobs are so goddamnly big!
Claire: Kindly gtfo with your Italian sausage. Again.