Similar to multi tasking but not as dificult.
normally just hands doing seperate things such as shutting the fridge whilst opening the microwave.
can be used as a cover when doing something your not supposed to. eg. grabbing another beer and squeezing a girls ass. when she turns around you can claim it was you because you were getn another beer.
"i was eyeing up that girls ass before so i did some quick semi tasking as i got another drink and groped her up"
"bro semi task for me and put this on the barbie while u turn the steaks"