磨蹭

磨蹭	mó ceng	to rub lightly / to move slowly; to dawdle; to dillydally / to pester; to nag
磨	mó	to rub / to grind / to polish / to sharpen / to wear down / to die out / to waste time / to pester / to insist
磨	mò	grindstone / to grind / to turn round
蹭	cèng	to rub against / to walk slowly / (coll.) to freeload