Most preggers is an informal term which means to be pregnant to the greatest extent. In medical terms, the word gravid is used to describe the same condition. Another term for most preggers could be heavily pregnant. Other synonyms include expecting, with child, having a bun in the oven and in the family way. These terms are all typically used in a friendly, colloquial setting and may not be suitable for use in formal conversation or medical documents. In any case, the focus should be on respecting the experience and needs of the person who is pregnant rather than finding the most playful term.