smart-alec/-aleck

a smart alec/aleck - someone who is always trying to seem more clever than everyone else in a way that is annoying.

He's just some smart-alec journalist. (always before noun)

• a stitch in time.
• a stitch in time saves nine.
• a stone's throw
• a stool pigeon
• a storm in a teacup
• as to the manner born
• as tough as nails
• a straight arrow
• a straight shooter
• a straw in the wind
• a stroke of luck
• a strong stomach
• a stud-muffin
• a stuffed shirt
• a stumbling block
• a sudden rush of blood
• a sudden rush of blood to the head
• as usual
• a sweet deal
• a sweet tooth
• as well
• as well as
• a sword of Damocles hangs over head
• a sword of Damocles hangs over someone's head
• as yet