Someone that is shit at fishing or someone that is fishing for pointless small fish. Someone that is intentially catching poinless small fish is 'Noddy Bashing'
Mark, Ross, Jov, and Will are examples of Noddies as they regularly blank (fail to catch fish). A noddy act would be to tie the hook on with a granny knot or put a boilie straight onto the hook. You would be a noddy if you had your bite alarms on fully volume.