When did Monsters become MOBs?

Or conditions become 'buff's?

I've been P'n'P roleplaying for decades but it's only recently that I've noticed that we've started to refer to monsters as mobs (which I thought was game from MMOs e.g World of Warcraft).  Also my wife noticed that we were also calling spells like 'Haste' buffing spells! That seems to have happened as well.

I'm not sure when it started in our games, and I'm not against it, but it's interesting how the lexicon has gone full circle from P'n'P > MMO > P'n'P.

Don't get me started on the game play! (4E anyone?)