different between leery vs leeroy

English

1718, "untrustful, suspicious", either from leer +? -y, lear (“learning, knowledge”) +? -y. More at leer, lear.

leery (comparative leerier, superlative leeriest)

Cautious, suspicious, wary, hesitant, or nervous about something; having reservations or concerns.
Since he was bitten by a dog when he was young, he has always been leery of animals.

From the Internet character Leeroy Jenkins.

leeroy (third-person singular simple present leeroys, present participle leeroying, simple past and past participle leeroyed)

(Internet slang) To run headfirst into a situation without prior planning or consideration.

Send