stick
n.— «Among employees at the Preston Valley donor center, Mr. Cone is known—in professional parlance—as a “difficult stick.” “He’s done this for so long, it’s difficult to hit him in the right place, where he doesn’t already have scar tissue,” said Toni Douglas, who administered the intravenous needle Thursday.» —“Man donates 99 gallons of blood in 50 years” by David Flick Dallas Morning News (Texas) Mar. 9, 2007. (source: Double-Tongued Dictionary)