possum¹ (formerly also 'possum) /posˈəm/

1. In America, an aphetic form of opossum (informal)
2. Applied also to the Australasian phalanger

To play possum

• on the bias
• on the bit
• on the blink
• on the block
• on the boil
• on the bone
• on the bot
• on the bounce
• on the bow hand
• on the brain
• on the breadline
• on the brink of
• on the broo
• on the buroo
• on the button
• on the cadge
• on the cards
• on the carpet
• on the cheap
• on the chopping block
• on the club
• on the contrary
• on the crest of a wave
• on the cross
• on the cuff