1. The act of tucking one's dick in between their legs so they can fit into girl pants. (v. or n.) Ususally pertaining to those silly 'scene' kids.
2. Chickening out.
1. Jock: That stupid scene boy's such a pussy - I bet he had to dicktuck just to fit in those tightass pants.
2. Way to dicktuck, you faggot - you killed the senior prank!