The Collaborative International Dictionary
overfamiliar
overfamiliar \overfamiliar\ adj. Taking undue liberties; assuming an unwarranted tone of familiarity.
Syn: familiar.
Wiktionary
overfamiliar
a. 1 common or repeated to the point of being unnoticed or annoying 2 (context Used with “with” English) so acquainted with something, that one doesn't notice it, or is annoyed by it 3 overly friendly or intimate
WordNet
overfamiliar
adj. taking undue liberties; "young women disliked the overfamiliar tone he took with them"
Usage examples of "overfamiliar".
He did not miss the defecations of animals and the smells of strange things cooking or overfamiliar things rotting.