to dip (a biscuit, doughnut, a piece of bread, etc) into liquid, e.g. a drink or soup, before eating it
to submerge (somebody or something) temporarily in water
in basketball, to put (the ball) through the hoop from above in a slamming movement, as distinct from scoring from a distance
in basketball, to score a goal by dunking
dunker noun
[Pennsylvania German dunke, from early High German dunken, from Old High German dunkōn]