Thank you. I checked a few translation sites and found that "Fuck off!" in Czech seems like it can be several things. - "Jděte kurva pryč!" (lit. Go the fuck away!) - "Trhni si!" Computer translation puts that as seeming to translate to "Jerk!", "Jerk off!" or "Take a break!", which may be a 'rude' way to say "Go away." But other sites for context translation put it as saying "Fuck you!" - "Naser si" seems to also translate to as you said; "Screw yourself!" or "Fuck you!" Some Czech translation forums I looked at are saying "Fuck off!" is "**jdi do prdele!**" To be used as vulgar, offensive, and an expression of anger or contempt; "We don't want your kind here, now fuck off!" Though computer translations of that say it translates to "Go to hell!", but adding an asterisk at the end makes it instead translate to "Fuck you!" I'll add all of them to the OP. Thank you.