Opportunist
Full definition of opportunist
Noun
opportunist
(plural opportunists)- Someone who takes advantage of any opportunity to advance his own situation, placing expediency above principle.
- 2011, November 12, , International friendly: England 1-0 Spain, James Milner's angled free-kick was headed on to the post by the tireless Bent and Lampard the opportunist was perfectly placed to stoop and head in from virtually on the goal-line.