her isn't in it	she isn't very enthusiastic about it
learn the poem by	learn it by memory
she's all fingers and thumbs	never does anything
by rule of thumb	without falling a fixed set of rules
go straight to my head	make me feel drunk
standing on his head	very easily
down in the mounth	depressed
through world of mouth	throw people telling each other about sth
under our noses	openly but without having been noticed
put your back into it	put afford