How bad is lying on the resume?

So I got fucked over by two companies in a row before this job that I've been at for a year. Obviously this doesn't look good on the ol' resume. One was a toxic af startup, the other lied about the day-to-day of the job. It's not really my fault in both the positions.

There was a 3-5 month gap between the jobs. How much am I stretching the truth if I make it look like I was employed at those locations during my little break? Like is this something that will for sure be uncovered in the hiring process or can I wing this?