timeserving

Characterized by an obsequious or too ready compliance with the times, and especially with the will or humors of those in authority; obsequious; truckling.

An acting conformably to times and seasons; now, usually, an obsequious compliance with the humors of men in power, which implies a surrender of one’s independence, and sometimes of one’s integrity.

Obsequiously complying with the spirit of the times, or the humors of those in power.

An obsequious compliance with the spirit of the times, or the humors of those in power, which implies a surrender of one’s independence, and sometimes of one’s integrity.

A variant of time-serving.

taking immediate advantage, often unethically, of any circumstance of possible benefit