There isn't any strict minimum legal drinking age in Jamaica. Or better said officially it's 18 years old like in a many other countries, however this law is hardly enforced. As English is the official language, there is no surprise that you can simple say Cheers! when you make a toast speech.
English
Creoles and pidgins
(Jamaican Creole)
National / mainly used expression(s)
How to say cheers in different countries (languages)
Other expressions and phrases in Jamaica