Leaving something as-is with 〜っぱなし
Grammar: Condition » 〜っぱなし
っぱなし is appended to a verb stem to show that something has been left in the state or condition from that action, with a negative connotation to leaving it as such.
ぱなし comes from the verb 放す.
Blue tries to sneak into Masaki’s cottage, but the door is locked. Yotsuba invites her neighbors over for coffee. She first gives the three a tour of the house, leading up to the kitchen. Chi’s mother comes into the room. The use of っぱなし means that Chi has scattered her toys out earlier, and they are still scattered out. This has a negative connotation, as Chi should have put her toys away after playing with them.Further Reading
Examples
Leaving a door unlocked with 〜っぱなし

Leaving the futon out with 〜っぱなし

Leaving toys scattered about with 〜っぱなし
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