An uncircumcised dick. Basically you can remove the letter 'c' from dick as it stands for 'circumcised'.
Jen and Melissa texting:
Jen: Hey Melissa I just had sex with Dave!
Melissa: Hey girl, I am happy for ya... How was it?
Jen: It was great, just that it was my first dik.
Melissa: Seriously? You never had one before?
Jen: No, I always had dicks, and I find them cleaner tho.
Melissa: Oh I love diks more than dicks lol
Jen: Gotta go wash my mouth... ttyl Melissa: xx