「おおきに」 = 「ありがとう」
「ぼちぼち」 = 「そこそこ」, 「そろそろ」, 「ゆっくり」
Note: Seems to be mainly 大阪弁. The people in Osaka love to use this word, while I was living there I heard it practically every day. It can be used in a lot of different contexts. There’s a more detailed explanation with examples here.
「あかん」 = 「だめ」, 「いけない」
