"Full of holes" is an idiom that implies something is incomplete, flawed or unreliable. Some synonyms for this phrase include "flawed," "defective," "imperfect," "incomplete," "unsound," "shoddy," "leaky," "perforated," "porous," and "pockmarked." When a sweater is full of holes, it means it's not warm enough to wear outside, or when a plan is full of holes, it suggests that there are numerous gaps or weaknesses that need to be addressed. Additionally, "full of holes" can be used to describe a theory that lacks evidence or credibility. Therefore, it is essential to consider the appropriate synonyms to communicate the intended meaning clearly and succinctly.