Check system settings for a keyboard entry / applet. I’m on LMDE Cinnamon and have no idea what the equivalents are on Kubuntu, but over here it’s definitely possible to change/remove the default keyboard assignments and set up custom ones instead.
For example, I have Shift+WWW (the multimedia key that starts a web browser by default) set to start the browser with an alternate profile. I could just as easily set plain old WWW to, say, start a terminal instead, or run that custom command.
The hardest part is knowing what custom command to run to get the desired effect.
The last thing I messed around with choked on some wide characters that weren’t in the current locale, so I guess picture the top half of the burger bun, about two thirds of the top part of the patty, a small pile of raw ingredients off to the side and some inexplicable six-inch nails through the raw meat, maybe.
Most of the rest of the stuff I do could be compared to those nouvelle cuisine jokes that have been running since the 1980s. Large plate, inexplicably small serving of something allegedly gourmet but is probably a cube of the cheapest pâté from the closest supermarket that was flash frozen and then stylishly drizzled in jus de menthe or something.
Bon appetit