FUTUO, FUTUERE, FUTUI, FUTUTUS, V.: To fuck, specifically in the sense of penetrating a woman.
FUTUE TE IPSUM/AM/UD! - Go fuck yourself!
FUTUETE VOS IPSOS/AS/A! - Go fuck yourselves!
FUTUETE - Go fuck (off?) - need to figure out if it can be used in this sense, or a word for masturbate be used in the context.
FUTEO HOC - Fuck this.
Originally wanted to use COMPLEXE, but it seems to more literally mean: "have sex" than usable as an expletive.
FUTUO is specific unto women, however the rude connotation of the verb seems more likely for it to be chosen, when trying to tell one to go fuck themselves.