sweet smell of success

home sweet home

Expressing contentment or relief at residing in or returning to one's own home.

keep someone sweet

To keep someone friendly or satisfied by complying with their wishes or preferences.

smell a rat

To sense something suspicious.

smell blood

To sense that one has an advantage over an adversary or rival.

smell fishy

To seem suspicious.

smell like a rose

To be regarded as appealing, virtuous, or respectable; to be untainted or unharmed.

smell like a tart's handbag

To smell strongly of perfume.

smell of an oily rag

A very small amount, or the absolute minimum (usually of money).