The dirty wet film on the surface of flip flops after a long hot summer. The stinky wet film on the bottom of your shoes after wearing them for a long time, especially without socks.
Ryan Seacrest had his flip flops stolen at the beach and he warned the thief that they were old and covered in Sog.
The abbreviated term for Soggy Biscuit as a "SOG" gets emotional when referred to by this term.
1- Someone who simps over a different girl every week before realising they're out of his league.
2- Someone who believes they're a psychologist and calculates his every move.
3- A lad who prefers the company of the opposite sex, a gay best friend if you will.
1 "Stop being such a SOG she's way out of your league man"
2 "Stop being such a SOG and chill with the boys"
3 "You're pulling a SOG on it, just because she said Hi to you once doesn't mean she likes you man"