to do something secretly without their knowledge
faire quelque chose secrètement sans qu'ils en aient connaissance (faire quelque chose secrètement sans qu'ils en aient connaissance)
"She was talking about me behind my back."
"Elle parlait de moi derrière mon dos." (Elle parlait de moi **derrière mon dos**.)
to reconnect later to get an update
to generate excitement and talk about a product or event
to accept responsibility or blame, often unfairly.
to lead by example, taking the initiative
in the process of being developed or built
to stop something before it becomes a bigger problem