"A bit like" is underselling it. It is that. Occasionally, I politely ask people objecting to the term "cis" what word they would prefer I use instead. I've had people directly tell me I should refer to cis people as "normal".

Another, much more interesting response I've gotten multiple times is that I should use "man/woman" instead of "cis". Which implies that transgender people either don't exist, or don't belong to either category.