The Knicks hit The Wall last night, The Wall of Complacency.

After winning all five games of their homestand, the Knicks began a two-game road trip last night in the nation’s capital full of themselves.

The Knicks got humbled fast thanks to speedy Wizards point guard John Wall, energized by playing before his college coach, John Calipari, and point-guard legend Magic Johnson.

The Wizards are a different team now that Wall, the former No. 1 overall pick, is back leading the fastbreak and he led Washington to a 106-96 victory at Verizon Center with 21 points and nine assists.

Knicks center Tyson Chandler was fuming after the game and may have even taken a poke at the coaching staff.

“If we want to accomplish our goal, we have to get ready for games like this and get up for games like this,’’ Chandler said. “We were simply outplayed and we can’t allow things like this to happen.

“We have to stick to the game plan and, if the game plan doesn’t work, we have to make adjustments.”

The Wizards are 13-35 but have won seven of their last eight home games. The Knicks, apparently, never got that info.

“We went flat,’’ coach Mike Woodson said. “You got to give Washington credit. They played great from beginning to end. We just showed up thinking we were getting the win.’’

The Wizards shot 53.2 percent — 68.4 percent in the fourth.

“We couldn’t get any stops,’’ Woodson added. “Awful across the board.’’

J.R. Smith said the Knicks (31-16) fell back into the trap of taking lesser teams lightly.

“They’ve been playing better with [Wall],’’ Smith said. “It’s still disappointing though. We expected to come in here and win and I think that’s part of our problem. We just expect teams when we come in the building to lay down and not play and we can’t do that.’’