We use the phrase all the time without considering its derivation. But picture what “get it out of your system” actually means. There are only so many ways to sweat expectorate or . . . uh eliminate . . . whatever shouldn’t be there in the first place. The good news for David Ortiz is that he’s picked the right time to experience his first extended slump of 2013. The Red Sox are in first place and just took two of three from the Orioles even after last night’s 3-2 loss. Ortiz might as well get it out of his system now which makes his choice of words to describe a six-game hitless streak appropriate. “(Expletive) happens” Ortiz said last night. “It’s not the end of the world. Papi’s going to struggle too. I’ll be back.” Ortiz’ travails continued with an 0-for-4. He is now 0 for his last 22 and hasn’t recorded a hit since Aug. 18 during the last homestand. It’s a testament to Ortiz’ remarkable season that it took this long for him to really hit a wall. He hit .154 on a seven-game trip through Tampa and Baltimore in June — dropping his average to .299 for exactly one game — but otherwise he has been a machine. And he undoubtedly will be again not that that’s of much solace to him now. “Hey I’m a player just like everybody else” Ortiz said. “I’m not going to put pressure on myself. We don’t have time for that. Just keep trying. That’s the only way you can get out of it.” In Wednesday’s victory over the Orioles — and it should be noted that the Red Sox are 4-2 during Ortiz’ hitless streak — he skied a pair of balls to the warning track in left that needed just a little more oomph to find the seats. Last night was a different story. Ortiz struck out twice including in the eighth inning with the tying run on third and only got the ball out of the infield once.