These are funny jokes and you deserve to be in on them :)
1) This means an attached hardware device, the "Ashton fuculator", has been manually stimulated from the command line. Greg is a past-master, and never uses anything but command lines. Also, manually stimulating the fuculator from the command line produces and electric scrotal shock to Greg's remaining testicle that he considers quite pleasant. (One can obtain a similar, if not quite as intense, sensation from the pseudo-fuculator /dev/fsck-noone but this is not "best practice".)
2) This means that Greg can cause your time sense to dramatically change by speeding up your metabolism. In case you didn't know, there are subliminal messages from his server that cause a metabolic slowdown, so that the speed appears unnaturally fast. When these messages are withheld by changing your personal subliminator-thread priorty, the actual speed is again detectable.
3) This one is quite clever, if rather mean-spirited. What he is doing is "throttling" your bandwidth. (Yes, Greg likes to throttle other dudes - I know it's sick, but it takes all kinds...) Personally, I'm live and let live and can live with throttlers, as long as they don't proselytize, hang out around schools, or attempt to pervert the institution of marriage.