 Terrill was born on June 27, 1980, in Lebanon, Indiana.Growing up, Terrill had two brothers, Jason and Troy; Jason taught him how to play guitar and played college football at Ball State, whereas Troy played college basketball at Indiana University – Purdue University Indianapolis.Craig played high school football with the Lebanon Tigers, where he set a record for most sacks in a season, with 27, and graduated as the team's all-time sack leader.