top dog

noun

Meaning

The boss, the leader (of the pack)
In a competition, the one expected to win

Synonyms

big cheese,

big enchilada,

big kahuna,

big wheel,

bigwig,

grand poobah,

head honcho,

kingpin,

muckety muck,

top banana,

top cat,

favorite,

favourite,

safe bet,

sure bet,

top cat