Used when you don't understand something, similar to a dog on tv. Usually emphasized by cocking your head. Example: You need to install the device driver current version, then reboot, then uninstall the app, then reboot, then reinstall the app.... Rar? Say that in English.
RAR?
Meaning of RAR? in English
Slang English vocab. Английский сленговый словарь. 2012