Collins COBUILD Advanced Learner's English Dictionary - shell out

If you shell out for something, you spend a lot of money on it. (INFORMAL) You won’t have to shell out a fortune for it... ...an insurance premium which saves you from having to shell out for repairs... = fork out PHRASAL VERB: V P n for/on n, V P for/on n SHELL PROGRAM A shell program is a basic computer program that provides a framework within which the user can develop the program to suit their own needs. (COMPUTING) N-COUNT