I won’t use “convo” as that is a a damaged wreck of a word, a totalled word. Let’s think of something fun.
How about a word or phrase that your mother used that you find yourself using as well? My mother used to say “you silly goose” to my children when they were young. Her tone was both affectionate and patronizing. Like saying, “Although you are very cute, I know better than you do.” I never use that phrase but it is one that makes me think of her, standing by the kitchen stove, looking down at her small grandson with a crooked smile.