Το απόγευμα πίνω καφέ και τρώω ένα μπισκότο ή λίγο κέικ.

Yes, literally το απόγευμα means the afternoon, but in Greek it is very commonly used adverbially to mean in the afternoon.

So:

• το απόγευμα = in the afternoon
• literally: the afternoon

Greek often uses the article this way with time expressions:

• το πρωί = in the morning
• το μεσημέρι = at noon / at lunchtime
• το βράδυ = in the evening / at night

So the article το is completely natural here.

It mainly means afternoon, usually the time after noon and before evening.

A rough time division is:

• πρωί = morning
• μεσημέρι = noon / midday
• απόγευμα = afternoon
• βράδυ = evening / night

In some contexts the boundaries are flexible, but απόγευμα is normally best understood as afternoon.

Because Greek verb endings usually already show the subject.

Here:

• πίνω = I drink
• τρώω = I eat

So Greek does not need to say εγώ unless the speaker wants emphasis or contrast.

For example:

• Πίνω καφέ. = I drink coffee.
• Εγώ πίνω καφέ, όχι τσάι. = I drink coffee, not tea.

This is very common in Greek.

Both verbs are in the present tense:

• πίνω = I drink
• τρώω = I eat

In a sentence like this, the present tense usually describes a habit or something that regularly happens:

• Το απόγευμα πίνω καφέ... = In the afternoon I drink coffee...

So this is most naturally understood as a routine or usual action, not necessarily something happening right this second.

Because καφέ here is the accusative singular form, which is used for the direct object of the verb.

The dictionary form is:

• ο καφές = coffee

But after a verb like πίνω you need the object form:

• πίνω καφέ = I drink coffee

This is a very common masculine pattern:

• ο καφές → τον καφέ
• ο χυμός → τον χυμό
• ο φίλος → τον φίλο

In everyday speech, when there is no article, you often just notice the changed noun form:

• πίνω καφέ
• θέλω χυμό

Because Greek is treating the two foods differently:

• ένα μπισκότο = one biscuit / a biscuit
  This is a countable item.
• λίγο κέικ = a little cake / some cake
  This is being treated as an uncountable amount, like a piece or portion of cake.

So:

• ένα is used with singular countable nouns
• λίγο is used for a small amount

Compare:

• ένα μήλο = an apple
• ένα μπισκότο = a biscuit
• λίγο νερό = a little water
• λίγη ζάχαρη = a little sugar
• λίγο κέικ = a little/some cake

In English we often say some cake, and Greek often uses λίγο in that kind of situation.

Because λίγο must agree with the noun it goes with, and κέικ is treated as a neuter noun in Greek.

The forms are:

• λίγος for masculine nouns
• λίγη for feminine nouns
• λίγο for neuter nouns

Examples:

• λίγος καφές = a little coffee
• λίγη σοκολάτα = a little chocolate
• λίγο κέικ = a little cake

So the form λίγο is used because κέικ is neuter.

κέικ is a loanword from English cake, and in modern Greek it is usually treated as a neuter indeclinable noun. That means its form often stays the same.

So you may see:

• το κέικ = the cake
• λίγο κέικ = a little cake
• θέλω κέικ = I want cake

Many loanwords in Greek behave this way, especially some modern food words and foreign nouns.

Yes, ή means or.

So:

• ένα μπισκότο ή λίγο κέικ = a biscuit or a little cake

Like English or, it can depend on context whether it feels strictly one-or-the-other or just presents alternatives. In a simple sentence like this, it just gives two possible snack options.

Be careful not to confuse:

• ή = or
• η = the (feminine article)

They sound the same, but ή has an accent mark and means or.

Greek often omits the article with foods and drinks when speaking in a general or indefinite way.

Here:

• πίνω καφέ = I drink coffee
• τρώω ένα μπισκότο = I eat a biscuit
• λίγο κέικ = a little cake

With καφέ, the meaning is general: coffee as a drink, not a specific coffee already identified.

With ένα μπισκότο, the speaker means one individual biscuit, so the indefinite article ένα is used.

Greek article use does not always match English exactly, so it is best to learn these food-and-drink expressions as common patterns.

This order is very natural, but Greek word order is more flexible than English.

The basic sentence is:

• Το απόγευμα πίνω καφέ και τρώω ένα μπισκότο ή λίγο κέικ.

You could also move things for emphasis, for example:

• Πίνω καφέ το απόγευμα...
• Καφέ πίνω το απόγευμα...

But the original version is the most neutral and natural for a learner to use.

Greek often changes word order to highlight information, but not every possible order sounds equally natural in every context.

A simple pronunciation guide is:

• Το απόγευμα ≈ to a-PO-ghev-ma
• πίνω ≈ PEE-no
• καφέ ≈ ka-FE
• και ≈ ke
• τρώω ≈ TRO-o
• ένα ≈ E-na
• μπισκότο ≈ bee-SKO-to
• ή ≈ ee
• λίγο ≈ LEE-gho
• κέικ ≈ KEIK

A few useful notes:

• μπ at the start of a word is usually pronounced like b
• γ before ε or ι sounds like a soft voiced sound, often approximated as y or a soft gh
• the accent mark shows the stressed syllable

So the stressed syllables are:

• απογευμα
• πίνω
• καφέ
• τρώω
• μπισκότο
• λίγο
• κέικ