Plumbago

[Sarah]

A genus of herbaceous plants with pretty salver-shaped
corollas, usually blue or violet; leadwort.

[Zipporah Schumaker]

A state of blue balls where a person has failed to release their [seed] for quite some time.

As in Get your [gums] round my [plums]!

[Magaret]

[The pain] felt in the lower regions when a [gentleman] has failed to [deliver] this letters for quite a while

[Michiko]

An evergreen flowering shrub or climber which is widely distributed in warm regions and grown elsewhere as a greenhouse or indoor plant.