SMACK (Soldier Minus Aptitude, Courage, and Knowledge) is an United States Air Force Academy term used to refer to cadets in their beginning or "Fourth Class" year.
Smack was a Finnish band, which was active 1982-1990. The band's original line-up consisted of singer Claude, guitarists Kartsa and Manchuria, bassist Cheri and drummer Kinde.
A smack was an English sailing vessel that was used to bring the fish to market for most of the 19th century and even in small numbers up to the Second World War.