I. verb
Etymology: shell (II) + out
transitive verb
1. : to hand out or over (as money) demanded or needed : pay out : contribute , disburse , produce
known for his reluctance to shell out money — Barry Bingham
2. : to remove entire by separation from its environment (as by the use of blunt instruments)
shell out a tumor
intransitive verb
: to furnish the money needed or called for : pay up
makes it unnecessary to shell out to … racketeers — J.F.McDonald
II. noun
: a pocket billiards game played with 15 object balls by three or more players with a stake being received by a player from his opponents each time a red ball is pocketed