If you're still confused about what exactly constitutes sideboob, you're about to get even more confused.
The important thing to remember, though, is that sideboob isn't just reserved for female celebrities. A lot of things can show off that oh-so-sexy sliver of skin. Seriously: old men, cookies, babies, even celestial bodies... You name it, it can and probably has shown some sideboob at some point.
Don't believe us? If you really want proof, just check out these 21 examples of other things showing sideboob below.