balloon goes up

a little of something goes a long way

Only a small amount of something is usually required to produce a great effect.

anything goes

There are no rules or restrictions.

balloon knot

The anus.

here goes nothing

Indicates a lack of confidence or certainty about the activity about to be tried.

how goes it

An informal greeting roughly equivalent to how are you.

make it up as one goes along

To improvise continuously.

trial balloon

An idea, suggestion, or prospective action, product, etc., offered to an audience or group in order to test whether it generates acceptance or interest.