Can we add Bughouse to lichess?

title says it all

Most probably, We can't ,
Contact developers

Somebody please explain me what is Bughouse!

bughouse is four player crazyhouse.

oh ok

Bughouse: en.m.wikipedia.org/wiki/Bughouse_chess

Probably no, in lichess update forum Thibault said that they have no plans to add a new variant in lichess.