Real Dictionary

do-it-yourself
A do-it-yourself shop is one that sells tools, paint, and other equipment needed for DIY.
Do-it-yourself things are things that you make or do yourself, rather than buying them ready-made or paying someone else to make them or do them.
uncountable noun: Do-it-yourself is the same as DIY.

do-it-yourself in American English
adjective: of or designed for construction or use by amateurs without special training
noun: the practice or hobby of building or repairing things for oneself, usually in one's own home

do-it-yourself in British English
of, used for, or engaged in do-it-yourself
the practice of constructing, repairing, or redecorating something, as in one's home, by oneself instead of hiring another to do it
noun: the hobby or process of constructing and repairing things oneself