also: いいねがえし
noun
like for like; reciprocating a like
Internet slang for returning a social media like, often with the expectation of mutual engagement.
彼はいつもいいね返しをしてくれる。
He always likes my posts back.
いいね返しが面倒で、SNSをやめた。
I quit social media because reciprocating likes was a hassle.
The act of liking a post; いいね返し is the reciprocal action.
Compound of いいね (social media 'like') and 返し (returning, from 返す).