backwards and forwards {adv. phr.} To the full extent; in all details; thoroughly; completely. * /He understood automobile engines backwards and forwards./ * /He knew basketball rules backwards and forwards./ * /I explained matters to him so that he understood backwards and forwards how it was./
BACKWARD AND FORWARD
Meaning of BACKWARD AND FORWARD in English
Slang English vocab. Английский сленговый словарь. 2012