1. A condition which occurs when a male running in a
track meet fails to wear supportive underwear, and the testicles bounce freely.
2. The plural for a type of
computer mouse that involves a stationary ball that rotates to move the
cursor.
1a. "Man, I wore boxers instead of
tighty whities when I ran the 1600-meter today. I've got a bad case of trackballs."
1b. "John didn't want to have sex; I thought it was because he was cheating on me, but it turns out he just had a bad case of trackballs after
freeballing it at the track meet."
2. "I prefer trackballs to typical mice because I'm a loser that plays World of Warcraft 24/7."