When you take stimulant drugs (such as cocaine, adderall, meth) and your dick shrinks down into a tiny useless appendage
Guy 1 : Did you fuck that thot last night?
Guy 2: Nah man I railed some fat lines of blow last night and I got stim dick bad, I couldn’t get it up at all.
Someone who brags about having a 6 foot long dick, when they actually have a millimeter peter and don't want to disgrace every man in mother Russia. The best way to tell if someone is trying compensate for their tick tac is if they have a long staff. An example is any wizard from lord of the rings.