Crept meaning : To move slowly with the abdomen close to the ground. Of plants, to grow across a surface rather than upwards. To move slowly and quietly in a particular direction. To make small gradual changes, usually in a particular direction. To move in a stealthy or secret manner; to move imperceptibly or clandestinely; to steal in; to insinuate itself or oneself. To slip, or to become slightly displaced. To move or behave with servility or exaggerated humility; to fawn. To have a sensation as of insects creeping on the skin of the body; to crawl. To drag in deep water with creepers, as for recovering a submarine cable. To covertly have sex (with a person other than one's primary partner); to cheat with.