not know your arse from your elbow

not know your arse from your elbow to be stupid and confused about simple things一无所知，屁都不懂⇒ASS⇒be a pain in the arse at PAIN¹ (3)⇒SMART ARSE⇒work your arse off at WORK¹ (30)not know your ˌarse from your ˈelbow(BrE) (taboo,slang)to be very stupid or completely lacking in skill愚蠢之至；屁都不懂

• bingo-boy
• dendroclimatologist
• vertebra
• low velocity
• subaqueous
• epistemologist
• animal lib
• Ruther
• ice floes
• Dumas method
• alternation of generations
• hematolysis
• roastable
• antihemophilic factor
• bowl sb ↔ over
• ghostwrites
• cicala
• wide-band transformer
• grey mullets
• gray duck
• susurrate
• diaz-
• beguin
• the minute
• howdied
• toxoplasma
• evitable
• automatic press
• perique
• tavern
• notation
• pituitary gland
• urceolate
• play / act the fool
• picturesque
• berkshires
• a matter of record
• interrelationships
• parthenocarpies
• absolute realities
• Smritis
• cooping
• Okazaki pieces
• Roman noses
• between the beetle and the block
• margin trowel
• gas mask
• sclerosal
• bring to a stop
• trough
• hematoxylin trihydrate
• let bug (或 dab)
• back-offices
• retainer plate
• put the pot on
• romances
• great northern divers
• straighten sth↔out
• speechreaders
• symmetrise
• number ones
• make a bonfire of
• reflationary
• aerogrammes
• star telescope
• hexylresorcinols
• dismast
• avuncular relative
• Trondheim
• live through sth
• squalidnesses
• Aberdeenshire
• atomistic competition
• lounge
• jog trot
• antipatriotic
• unmitred
• subventions
• finalized
• at this point
• patientless
• rationale
• have someone in one's pocket
• casemakers
• contact bounce
• sighingly
• tide wave
• day-liner
• graphonomy
• pancreatographies
• thriftily
• apophony
• fulsomeness
• pattern song
• foregone conclusions
• achlamydeous
• sciaenoid
• perfectibilities
• dysesthesia
• heterotransability