An onomatopoeic word describing lovers being affectionate—making out, cuddling, or being lovey-dovey; can be playful or mildly disapproving.
カフェで若い二人がずっとイチャイチャしていて、少し気まずかった。
A young couple were cuddling at the cafe the whole time, which felt a bit awkward.
公共の場でイチャイチャするのは控えてほしい。
I'd prefer if people refrained from making out in public.
映画の中で二人がイチャイチャするシーンが多かった。
There were many scenes in the movie where the two were being lovey-dovey.