SNIOP
Acronym which stands for "Susceptible to the Negative Influences of Other People".
Poor John got SNIOP'd by his friends and decided to give up on his network marketing business.
SNIOP
Don't be 'Subject to the Negative Influence of Other People'. Put another way: Don't let the bastards get you down. Or a little more precise: Take your shit and go fuck yourself.
Life is better when you're no longer SNIOP.