British & Australian, American & Australian

someone who seems to know everything and annoys other people by showing how clever they are.

No one likes him because he's such a know-all.

• as a rule
• as as they come
• a saving grace
• as a whole
• as best as can
• as best as you can
• as best can
• as best you can
• as bold as brass
• a scandal sheet
• a scaredy-cat
• a scarlet woman
• as clear as mud
• as common as muck
• as cool as a cucumber
• as dead as a doornail
• as drunk as a lord
• as drunk as a skunk
• a sea change
• as easy as A, B, C
• as easy as falling off a log
• as easy as pie
• a second-class citizen
• a self-made man
• a seven-day wonder