たんと(poss. Kansai dialect) many, much, a great amount, excessive amount

母(はは)：「成長(せいちょう)期(き)なんだから、たんと食(た)べなさい。」

Mother: "You're in your growth period, so eat plenty." {(poss. Kansai dialect) many, much, a great amount, excessive amount}

在庫(ざいこ)がたんと残(のこ)っているからセールをすることにした。

We decided to have a sale because there is an excessive amount of stock remaining. {(poss. Kansai dialect) many, much, a great amount, excessive amount}

非(ひ)常食(じょうしょく)ならたんとあるから、お腹(なか)いっぱい食(た)べていいよ。

We have plenty of emergency food, so feel free to eat as much as you want. {(poss. Kansai dialect) many, much, a great amount, excessive amount}

昼食(ちゅうしょく)をたんと食(た)べてしまったせいで午後(ごご)の仕事(しごと)が捗(はかど)りません。

Because I ate too much lunch, I can't make progress on my afternoon work. {(poss. Kansai dialect) many, much, a great amount, excessive amount}

金(かね)がたんとあるといえども、無駄遣(むだづか)いをしていたら底(そこ)を突(つ)くでしょう。

Even if you have a great amount of money, if you waste it, you will eventually run out. {(poss. Kansai dialect) many, much, a great amount, excessive amount}