That phrase looks like a little mash-up of English and Indonesian, and I get why it can be confusing. In Indonesian online use, 'lirik' almost always means 'lyrics' — people type 'lirik' when they want the words of a song. So when you see 'bird of feather lirik' it's most likely shorthand for 'lirik "Bird of Feather"' — meaning the lyrics to a song called 'Bird of Feather' (or maybe 'Birds of a Feather' if someone dropped the s). Search-wise, Indonesians commonly drop words like 'lagu' and just write the song title plus 'lirik'.
On the other hand, if you break the bits down: 'birds of a feather' is an English idiom meaning people with similar traits stick together; Indonesian equivalents would be phrases like 'yang sejenis berkumpul' or 'serumpun' depending on tone. And 'lirik' can also be a verb in colloquial Indonesian meaning to glance or check someone out — like 'dia ngerlirik aku' — but that sense rarely sits next to an English idiom without context. In practice, 99% of the time 'bird of feather lirik' is someone looking for song lyrics, and if you want to be precise in Indonesian you'd say 'lirik lagu "Bird of Feather"'. I actually love these little language blends; they show how search habits and casual speech mix languages in everyday life.