travel dog
an erection while traveling (ie, in a car, on a bus, on a train).
(while driving)
passenger: "my god, i've got the biggest travel dog right now"
driver: "fuck man that's disgusting, get the fuck out of my car"
passenger: "my god, i've got the biggest travel dog right now"
driver: "fuck man that's disgusting, get the fuck out of my car"