its a Sinhala which is in use to show amaze.
it generally it means,
oh my god
holy mother
oh fuck
are u kiddin me
ammatasiri maarai ne
ammatasiri! aruta mokak welada?
ammatasiri anna balapan!
ammatasiri methana thibuna lali gedara koooo?
by bedsidecreeper October 27, 2009

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