UK artefact hunter the late Alan Hassel managed to get quite a few revealing comments from the metal detecting fraternity in this thread which starts off with a few libellous comments on me (and a huge chunk copied and pasted from another blog - no link), but once they get going, not a few other detector users from both sides of the Atlantic drop the hobby right in it... enjoy the spectacle.
British archaeologist living and working in Warsaw, Poland. Since the early 1990s (or even longer) a primary interest has been research on artefact hunting and collecting and the market in portable antiquities in the international context and their effect on the archaeological record.
"coiney" - a term I use for private collector of dug up ancient coins, particularly a member of the Moneta-L forum or the ACCG
"heap-of-artefacts-on-a-table-collecting" the term rather speaks for itself, an accumulation of loose artefacts with no attempt to link each item with documented origins. Most often used to refer to metal detectorists (ice-cream tubs-full) and ancient coin collectors (Roman coins sold in aggregated bulk lots)
"tekkie" - metal detectorist/metal detecting (a form of artefact hunting)