noun
receiving without giving back; taking without reciprocating
Describes a situation where someone receives a gift, favor, or benefit but does nothing in return; often carries a negative connotation of one-sidedness or ingratitude.
彼はいつももらいっぱなしで、お礼を言わない。
He always just takes and never says thank you.
もらいっぱなしはよくないよ。何かお返しを考えないと。
It's not good to just receive without giving back. You should think of something in return.