top banana

banana nose

A large, unusually long nose.

banana republic

A small country, especially one in Central America or the West Indies, that is dependent on a single export commodity (traditionally bananas) and that has a corrupt, dictatorial government.

cherry on top

Synonym of icing on the cake (“a thing which intensifies the appreciation of something already good, or (ironic) the regretting of something already bad”).

have one foot on a banana peel

To be in an unstable situation with a high risk of sudden negative change, facing difficulty, or appearing foolish.

make like a banana and split

To leave, depart.

on top

In a dominant position.

over the top

Beyond normal, expected, or reasonable limits; outrageous.

put the bottom rail on top

To reverse a hierarchy.