The phrase "am pins and needles" describes a feeling of nervousness, excitement or anticipation. Antonyms for this phrase would include words that express calmness or a lack of interest. Some antonyms could include "relaxed," "nonchalant," "indifferent," "uninterested," and "complacent." Using these words in place of "am pins and needles" would indicate a completely opposite emotion or state of mind. It is important to consider the context and tone when choosing an antonym for any phrase, as well as the connotations and implications behind each word choice.