a person or organization that is willing to use every chance to gain an advantage or make money:
• These companies represent a growing band of economic opportunists - they move with lightning speed whenever an opportunity opens.
— opportunistic adjective :
• We're a very opportunistic company, continually looking to strengthen ourselves strategically in individual market segments.
— opportunistically adverb :
• We're learning how to sell much more opportunistically.
Financial and business terms. 2012.