Taking a shit and ejaculating at the same time

Got the covid-19 vaccine

refers to the male leaving the copulation bed because he needs to take a crap, he sits there with his hard-on outside of the toilet bowl, drops a big turd and immediately flings a load of ejaculate toward the bathroom wall in front of him. There is no feeling of orgasming, simply of unloading some jism. Return to the bed and cum a lesser load.

the definition says it all