float

float an idea

to suggest something informally to see if people accept it or are interested in it. The mayor originally floated the idea, and it was quickly taken up by a number of city agencies.

test the waters

See also: idea

whatever floats your boat

do what makes you happy. If you want to have five children you should have five — whatever floats your boat.

Usage notes: also used in the form what floats your boat: By the time you've finished high school, you've probably figured out what floats your boat.

See also: boat, whatever