Terms for subject Informal containing at whose

English	Russian
be at loggerheads over who should take	не мочь поделить (только в контексте) The twins were at loggerheads over who should take the larger room.  4uzhoj)
know what/who is at the bottom of it all	знать, откуда ноги растут (VLZ_58)
one who drinks at someone's expense	опивала
one who drinks at someone's expense	опивала (masc and fem)
one who goes to bed at midnight	полуночница
one who goes to bed at midnight	полуночник