Only mad scientists on either side of the Atlantic pronounce all the syllables. It was kind of a shibboleth for us until all those movies came out and people caught on.

https://www.quora.com/Why-do-Americans-pronounce-the-word-laboratory-as-labratory-They-spell-it-correctly-but-I-wonder-if-theyre-all-dyslexic/answer/Claire-Jordan-10