Cuntdick refers to the feeling of jealousy from loaning out one's strap-on dildo], and imagining it in use by others. This results from the attachment some people feel towards their extraneous member. The emotion of cuntdick can be considered the male analog of loaning out your penis, if this were possible.
Cuntdick falls somewhere between jealousy and disgust.
This term is common within some lesbian communities.
Just loaned my strap-on to Stephanie, and I think she had sex with my ex-girlfriend... I'm feeling so cuntdicky right now.