A grower is someone who's dick looks tiny when soft but gets to a much larger size when hard. A shower is someone whose dick is already most of the full size soft and basically just solidifies when hard.

A person whose penis appears tiny when flaccid, but that redeems itself when erect.

Starts very small but erects be the size of thanos finger

Penis is small when soft, but it grows to a nice size when erect.

trader who does not show the full volume on a bid/offer is a grower not a shower.

A shower already has a big penis when flaccid and does not grow much more and a grower has a small penis flaccid but grows a lot having an erection

It's when your strength when bench pressing improves but your chest size does not