"Flunkyish" refers to someone who is subservient or overly eager to please in a way that is sycophantic or unscrupulous. Synonyms for "flunkyish" include servile, obsequious, groveling, fawning, cringing, and toadying. These words carry a negative connotation, often implying that the person in question is a sycophant or lacking in personal dignity. Other similar terms include subservient, ass-kissing, bootlicking, and brown-nosing. These words all express a degree of fawning or servility that can be seen as unappealing or negative. It's important to be aware of these terms and use them judiciously, as they can be seen as harsh or judgmental.