What does “throw back” mean?

Question

In this sentence:

I've throw back a lot of orange juice.

what does "throw back" mean?

Answer 1

In that particular sentence, it means drunk.

In that the person has "thrown back" a lot of orange juice, thrown the juice to the back of their throat, i.e. tipped their head back and drunk the juice.

Answer 2

I believe an alternate, perhaps British term, is to "knock back" (usually a drink).

Answer 3

1. Throw back or thrown back is definitely a reference to consuming a beverage.
2. It is also a loose reference to an old reference of the past... "That old song is a throw back".
3. However, if used by a younger person — say, in a text reference —, it is a common vernacular for paying due deference to a time gone past; remembering nostalgically. For example, teens will send me photos from their Instagram accounts that we had taken when they were younger. Swimming, crafting, painting, water balloon fights etc. The hash tag is always #tbtp which is throwing it back to... and my name. I'm an old gal so it always makes my day!