The combination of the two words "Jobby" and "Wank", which can both be respectively be searched for their meanings. To masturbate while on the toilet, as well as shitting.
Had a wobby today, my hard cock almost got trapped in the fall of shit as I was about to finish.
a wank and a jobby(a shit) at the same time
im gonna go have a Wobby lads, back in a second.
When you sneakily jack off beside your significant other, and finish on them. Without them knowing.
Last night my girl wanted to watch a movie instead of sex, so I just did a silent wobby while I was "getting a snack".