Find all Processes Except These Specific Ones

Is there a ps or pgrep option or standard practice what will let me list all the running processes on a machine EXCEPT for a few specific ones I don't want to see? Put another way -- let's say I have four processes running % ps PID TTY TIME CMD 26712 ttys000 0:00.45 -zsh 28228 ttys001 0:00.23 -zsh 42083 ttys002 0:00.11 -zsh 42396 ttys002 0:00.16 node and I have a text file with a few process IDs % cat /tmp/no-interest.txty 26712 28228 I want a command line invocation that will display _just_ the process information for 42083 and 42396. The more general problem I'm trying to solve is I want to show processes that started AFTER a certain point in time. I can get as far as building a list of currently running processes in a text file, but I'm blocked a bit on how to come up with a concise way to use this information to suppress the processes I don't want to see. I know how to do this with a short program in a variety of languages, but I'd like something I can invoke as a one liner and not have to worry about getting that program onto the specific machine I'm debugging.