When someone says that someone or something "gets out from under my feet," they mean that they are getting irritated or frustrated with something or someone that is getting in the way or preventing them from completing a task. There are many synonyms for this phrase, such as "getting on my nerves," "getting in my way," "being a hindrance," "being a bother," "irritating me," "annoying me," or "disturbing me." Using different synonyms can help add variety and nuance to your language and better communicate your frustration to others.