In the wallet
-
Indicates who the more important girl is when a guy is cheating. If youre [in the wallet], you are the girlfriend, fiancée, wife, more important girl. If you are NOT in the wallet, you are the [sidepiece], [goomar], the other woman, the less important woman.
Can be a physical picture in the wallet, but is mostly used as a reference to being in a someones heart/special place/thinking of someone seriously. You dont get told if youre in the wallet/out of the wallet by the guy, someone else tells you
In the wallet meaning & definition 1 of In the wallet.