God's flipping angry! (4)
I believe the answer is:
eros
'god's' is the definition.
(Eros is an example)
'flipping angry' is the wordplay.
'flipping' shows that the letters should be reversed in order.
'angry' becomes 'sore' ('sore' can be similar in meaning to 'angry').
'sore' reversed gives 'EROS'.
(Other definitions for eros that I've seen before include "Greek love-god" , "London landmark" , "capital statue" , "Cupid, son of Aphrodite" , "One worshipped" .)