op ‧ por ‧ tun ‧ ist /ˌɒpəˈtjuːnəst, ˌɒpəˈtjuːnɪst $ ˌɑːpərˈtuː-/ BrE AmE noun [countable]
1 . someone who uses every opportunity to gain power, money, or unfair advantages – used to show disapproval:
Voters dislike opportunists – politicians who change their policies according to opinion polls.
2 . someone who commits a crime because they have a chance to, and not because they planned to:
Most burglars are opportunists.
an opportunist crime
—opportunist adjective :
the opportunist policies of wartime leaders
—opportunistic /ˌɒpətjuːˈnɪstɪk◂ $ ˌɑːpərtuː-/ adjective :
opportunistic thefts from cars